Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b10dc69d0694be5…

MALICIOUS

PDF

88.3 KB Created: 2021-07-25 01:30:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 61d1c4d669e02f3c53d564b52770c236 SHA-1: a524c5d83b3f5ebbfcb22f1eefa955ce90f5ae09 SHA-256: 0b10dc69d0694be5d2eb0ba3f3861b300a95a6ac3aaa6825716ebe9b6983825d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed to redirect users. The presence of external URIs and the nature of the links suggest an attempt to lead users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://gymlesgeants.com/upload/editor/file/jifabigubomu.pdf
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160984fd26d0e8---sipaxuwepakujimuguxar.pdf
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c9a6dacbc55---rarobutas.pdf
    • http://uamarkets.com/images/file/gojabosulalij.pdf
    • http://cw-cut.com/uploads/file/xekefilapiru.pdf
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/s9okacf8ud92m6dgslgl59l8qo/83134450547.pdf
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/ga1j1poc48pqij7fna41fl7bc6/tapotegivu.pdf
    • https://nothingbutsafetyglasses.com/userfiles/file/pepizisefudenotuwugoturo.pdf
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d40aed2cad1---41198310483.pdf
    • http://abwhopewell.com/uploads/files/lugikugoj.pdf
    • http://astro2sphere.com/admin/images/file/zidok.pdf
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609487a3c581f---wipisamotefu.pdf
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16097dbe5e1b40---31272308535.pdf
    • http://hoacanh.net/luutru/files/napawetefu.pdf
    • http://esoftland.com/userfiles/file/31387947679.pdf
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a9fd6ff1731---33702893146.pdf
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/cc5573a0ba6d5f60dbec9a211895746e/33177049113.pdf
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/31a0ff87e9b9e5071b6eab25d6ee4e11/79165103912.pdf
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/tl03dd517iegav1a9l3c3n5c3k/tovibasivenobanaweri.pdf
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16076fcbde66fc---46171344086.pdf
    • http://asfus.net/virgsurv/userfiles/file/mogeparapenipoti.pdf
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/b3b3748707431ccb8ad2bd762461c27c/67271740735.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=verbatim+jacques+attali+pdf+english
    • 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_off0000ef16.bin
cc8c570efed77cbfb534518f899a7e9e49afed4cac7d2bc53d38ed03ac41a39f
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF16 20056 bytes
font_01_sfnt_off00012094.bin
25e24f8f22562a944ed999de0da0444d16e5ef47651527f890f0ae2051dd3081
pdf-font-stream PDF embedded font (sfnt) at offset 0x12094 11432 bytes
font_02_sfnt_off00013aa0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13AA0 16792 bytes