Malicious PDF — malware analysis report

Static analysis result for SHA-256 be83e967bb94a29d…

MALICIOUS

PDF

87.7 KB Created: 2021-08-14 13:27:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f8c92f7a4e7bda12b0fb1d0d0e382b06 SHA-1: ac0e4a7b4cc237db0601d1c73fd06dd5d2675282 SHA-256: be83e967bb94a29d278a1cc0933339d0d13e9a3ce8fb08f2e91178866f154f45
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a callback phishing scam, as indicated by the 'SE_CALLBACK_LURE' heuristic. It contains numerous links to external websites, many of which appear to be hosted on compromised CMS platforms or disposable domains, suggesting an attempt to distribute malicious content or redirect users. The ML classifier and ClamAV detection further support its malicious nature, likely serving as a lure for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://smidgel.ru/uplcv?utm_term=how+to+pair+blueparrott+b250-xt+with+samsung
    • https://bloomeng.com/uploads/92063997520.pdf
    • http://abnicum.com/files/file/45040764078.pdf
    • https://corianderedmonton.com/ckfinder/userfiles/files/10465336226.pdf
    • http://cochu.net/resimler/files/93175444355.pdf
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/85oovqrub93kjgqibhqiir82cl/75161871545.pdf
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/4e46d34aa902881fa426a7637c8c5b84/8320394474.pdf
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b08a6f15c8---powapikexomegaketamade.pdf
    • http://walkercombsfamilyreunion.com/clients/d/df/dfd517ab040340b2551da60fba195f5f/File/figufoj.pdf
    • http://inter-travel.hu/_user/file/supunakinufidux.pdf
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/gizurorafisimij.pdf
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160ba3054b4ef5---52600257789.pdf
    • http://palaciodelosnavas.com/userfiles/file/rigejagibomigojir.pdf
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dca24eebbaf---9581328775.pdf
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/242fe35nm6sfvks478kqtlqp55/31953398200.pdf
    • https://educhina.mn/editor/files/54591449434.pdf
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072fb7411c98---20638591502.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160727e20734c5---sinewere.pdf
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a4bedb147bd---rexib.pdf
    • https://pet-fashion.ro/mm/file/ramorojelonuniz.pdf
    • http://cesishotel.lv/res/wysiwyg/file/63323956655.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/8g7g93rilvphd67af2t5elpn3o/76276196089.pdf
    • https://ptogel2.com/contents//files/nuxibo.pdf
    • 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_off0000ee88.bin
8d528d7fcaa51d846196b52226dbf4bbb6aebc8cbb948ffb3328a7df645b691e
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE88 11528 bytes
font_01_sfnt_off00010997.bin
ea422d0e0a320f4bdd75d315ebbf7478d86130978fdbefb364c79aafb2d3ca08
pdf-font-stream PDF embedded font (sfnt) at offset 0x10997 18264 bytes
font_02_sfnt_off0001388f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1388F 16792 bytes