Malicious PDF — malware analysis report

Static analysis result for SHA-256 f36b30f872f482c4…

MALICIOUS

PDF

96.0 KB Created: 2021-07-21 07:33:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3c603bd34dab372c18e132f0c0aae03a SHA-1: d8c038f659f9dd8c54ef9f065d1e8f9ba8f7bdf9 SHA-256: f36b30f872f482c451ce5de9469cccd058e0bb2deb9936d8cdcf9b5ded114734
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to external sites, some of which are hosted on compromised CMS platforms or disposable domains. This suggests the document is likely used for phishing or to distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9486

Heuristics 6

  • 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.
  • 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://ccswcd.com/userfiles/file/6622752440.pdf In PDF document text
    • https://panegovernance.com/ourprojects/chowki/UserFiles/file/41175101412.pdfIn PDF document text
    • https://gencerenerji.com/resimler/files/53261539876.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609236f899581---20896636424.pdfIn PDF document text
    • https://exxontel.com/file/23382425405.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/e0f50c756c054e27eccf7661a750a999/45165562031.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/96fc6a65e796dc1790f4894d87c7cd31/83506932804.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/nhtq28aj40tgfgm2dc950hmbvt/85314880266.pdfIn PDF document text
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16087280105d39---9814134193.pdfIn PDF document text
    • http://xn--l3cbpp3gh4a5g5c.com/userfiles/files/xebopezagozera.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079450c2a827---87314030393.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b81230089---36394014224.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/ac7qtpahun9v4hq9kbmu2g38rf/33938836064.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0510357535---17440290429.pdfIn PDF document text
    • http://etasystem.net/userfiles/files/83163687906.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608db3fac4ab4---13605631401.pdfIn PDF document text
    • http://hhs63.org/clients/8/88/88ec95b665b56da82b1de85f097fba10/File/96994849126.pdfIn PDF document text
    • http://sushikyototogo.com/uploads/files/63187774155.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/06d796ac60931ad53dc8338a5bee308e/60282329914.pdfIn PDF document text
    • http://zzquansu.cn/d/files/wazulitisabisazid.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/p6oa82n1irhe6lf05cu8482plv/dekadi.pdfIn PDF document text
    • https://lanjutpt1.com/contents//files/gifizasep.pdfIn PDF document text
    • http://architettoangeli.it/userfiles/files/15454056922.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/6bs8ev4pgvv7cm09103ri30p11/mowusesijisironikunopiz.pdfIn PDF document text
    • http://ildungrice.com/fileupload/fckeditor/file/xowagobixokesa.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/79f1a47a7778784cdd6d4e98c922e231/kegufumap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=you+my+butterfly+sugar+babyPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e47c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47C 1700 bytes
SHA-256: 15171638d69c9281a983de8a04f8d213e5ed86d33053034f6aa0dd130c4010d8
font_01_sfnt_off0000ec94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC94 10700 bytes
SHA-256: 2ccc4918c0320148e28ba4ee4110f971cf9aa729067abc9544c4e99364f20632
font_02_sfnt_off00010541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10541 17100 bytes
SHA-256: 598b8207a7c4e5d5bcc56f6c46d41110a10cbcaf8eaa58f0d6271ce83dccbbb4
font_03_sfnt_off00011e92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E92 22792 bytes
SHA-256: 88e0625ca29c866b263457877ca1e547f25b7d25d8016a0806cc92cf52f88e9d
font_04_sfnt_off000157d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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