Malicious PDF — malware analysis report

Static analysis result for SHA-256 d208c8b597a55872…

MALICIOUS

PDF

144.3 KB Created: 2021-07-22 11:36:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: d61fe4af690119ec1ef8110b39c2d20b SHA-1: eed8c745f396896413a0b2cf8dba96a6ce741469 SHA-256: d208c8b597a5587251dc049105a60f197ea22ec898a3f979225707930e968c06
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to compromised websites and potentially disposable hosting, with several URLs pointing to PDF files. The presence of heuristics related to 'QR_LURE' and 'DOWNLOAD_BUTTON' suggests a social engineering tactic to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9914

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.agenbenangbandung.net/file/remubugizel.pdf In PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609e4d327ffae---xevilarevuvobute.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b31645cb04a---79501628660.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/4edc8c7602b0c096aeeaa95f49308c9e/11246641426.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608e79bfd822b---96812780116.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160807b06e9296---29855928466.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb997bdd97---toliginakife.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ce3884600---zabupatosalapagakebojogev.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d92e220c56e---77268523805.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/8657bec626bf0e2c6d322204d8819468/jogagufatelozufe.pdfIn PDF document text
    • https://infiniteprospects.com/FCKeditor/file/58459564584.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5ed87c01e---664706713.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/p7s0kgfcigq1g7klpk339jjp0r/todanebonudutiku.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/91ouic45q01lu8neunnhbb1r15/nowelunajimasibezixat.pdfIn PDF document text
    • http://cityhelps.org/clients/6/61/61afa7a028a8e04f14432b0fece6f2b0/File/gibitiluxuva.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160976cf75193f---muwanofazegazepusefaj.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/notaratomotufomexeg.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b59ec4e1fad---63147405467.pdfIn PDF document text
    • https://emilline.dk/ckfinder/userfiles/files/pugon.pdfIn PDF document text
    • http://meadescafe.com/userfiles/file/50223520904.pdfIn PDF document text
    • http://ysenb.kr/board/file/editor/file/24570169071.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16079b2f64dde1---kenuzuga.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/00acc8a8801c893820b7096183ac987b/71724832284.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/900257453fc609880748f8720c0d9823/dasigufowamogeje.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=hollywood+tamil+dubbed+movies+telegram+channelPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001afff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AFFF 21152 bytes
SHA-256: 554ee0f2089828c06ae4c636381e0c3b942eb35200f15b899022120642e01c34
font_01_sfnt_off0001e7a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E7A4 11316 bytes
SHA-256: 1c97013ad008a5441e63138a2e8a14d6a3c1781816334f0b7fff157218422bf7
font_02_sfnt_off000201de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x201DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000219eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x219EB 7032 bytes
SHA-256: e266b387e6748110ecc68b026038caa11846c8f71c5c03401820e7c06ca5b858

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