Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0b17384cce83af4…

MALICIOUS

PDF

78.6 KB Created: 2021-07-21 03:26:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4a6f0ef99890b9a0042fd7df8335827e SHA-1: a40e4decf7c264524ff6e77e315195b5871e0725 SHA-256: e0b17384cce83af49416a3064e19763c564c46247dcdf764399ea4deeee6c626
164 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to compromised WordPress uploads and other disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of a 'download button' lure further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • 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.
  • 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 https://rhodium.vn/uploads/news_file/3290905027.pdf
    • https://yellowstonewildlife.com/76402765181.pdf
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d347552e9c---59773593912.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099117e7ebbc---nedadofomubejemunetet.pdf
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/t3o8k1bd59oadvm26jqmk86o0t/verafowe.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/5d9c666338d4ebef59b51cbc67353ae9/97762233570.pdf
    • http://etre-belle.su/images/file/25812557687.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1609f5bd7b724c---dirojo.pdf
    • http://tlumacz-lipno.pl/pdrzewiecki/files/90469343968.pdf
    • http://quick-thailand.com/images/uploads/file/likibubidilotulezusurod.pdf
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b29414d8a36---71526610157.pdf
    • https://kultmotor.hu/images/files/luzamimopotula.pdf
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607818bbc5b07---gumuwavotepupel.pdf
    • http://thedewakohchang.com/image/upload/File/5699110982.pdf
    • http://geyikkimya.com/userfiles/upload/file/rukemotatiberumal.pdf
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/32f503b129559fdc72e638e213cd1fad/luzimuzunekubagutuzozaxu.pdf
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/63fe9331a72bd853c908f91ceec55fd0/95685967383.pdf
    • https://internationalmedia.com/userfiles/file/40566982360.pdf
    • http://driver-jazda.pl/upload/file/valizosugupesapunoluw.pdf
    • http://cartopack.com/Images/file/lebame.pdf
    • http://hopkinshigh1966.com/clients/1/10/1054c114374c88b4a165e91103565d41/File/84526836072.pdf
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0c451537e---jisomatokozovikase.pdf
    • http://terralis.eu/catalogue_dynamique/file/52936447405.pdf
    • http://tubietelbar.hu/uploadfile/kabuguxa.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=second+conditional+conversation+questions
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd7e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCD7E 16792 bytes
font_01_sfnt_off0000e590.bin
318032a4657de3c456ffa92306c7b73fcb934ea6cfc80081c6b8e412286e7c81
pdf-font-stream PDF embedded font (sfnt) at offset 0xE590 17132 bytes
font_02_sfnt_off000112ac.bin
4703035774acdde991166489ef77d42ec5c7282ca3b88c948ef53132b9a0243f
pdf-font-stream PDF embedded font (sfnt) at offset 0x112AC 10748 bytes