Malicious PDF — malware analysis report

Static analysis result for SHA-256 7818eecc910c1aca…

MALICIOUS

PDF

113.4 KB Created: 2021-07-17 08:24:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 73b6fd96c8b216cf4be4e766600e0ebd SHA-1: 2a00b3cf6a06674d912fbc94982517e801d3cbfb SHA-256: 7818eecc910c1aca851a5e262c167d4bc559347a5221c3561abc872e342fc138
116 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier strongly indicates maliciousness, and the 'SE_CALLBACK_LURE' heuristic confirms a callback phishing or tech-support scam pattern. The document contains numerous links to potentially compromised WordPress upload directories and other disposable hosting, suggesting it's part of a link farm designed to host malicious files. No scripts were extracted, but the presence of embedded URLs and the nature of the heuristics point towards a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • 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 http://anhbanglaw.com/userfiles/file/fejuxak.pdf
    • http://dolphinegypt.net/userfiles/file/lisebelupu.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608747dd4cacd---27806852161.pdf
    • http://glotecgh.com/upload/editor/file/93229356630.pdf
    • https://mongolia-volkslift.com/uploads/files/782702216.pdf
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608014235d728---xamodupiwirapulelabo.pdf
    • https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/muxumuvikavojetutinotu.pdf
    • https://vresponse.net/userfiles/file/pujivasuzorepofusizakov.pdf
    • http://emons-verlag.net/testarea/cwsCMSlight/media/files/66045986931.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/f206accb160821e9df25bca1299ae25f/26496389957.pdf
    • http://gruppocinofilomarsalese.com/userfiles/files/89488855538.pdf
    • http://slsnn.ru/content/file/gusizizufiniledodiponit.pdf
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c06357439---wejakixuxukulasifebi.pdf
    • http://thetuckerfamilyreunion.com/clients/67950/File/nefowiwozulaw.pdf
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/3toc5s67jfoorcm97m20ahlilu/pikowadofel.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1eaa16756---7880553166.pdf
    • http://foodchemsino.com/d/files/tipaxivoxiso.pdf
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/7282be89656443f9bf19c983706ec7bb/wijulowavepetanozafadusof.pdf
    • http://suapaiatuipelehakefamily.com/clients/80707/File/20704621890.pdf
    • http://www.cafeinca.com/img/public/contenido/file/wavanarotimixojebe.pdf
    • http://pnmanagementsolutions.in/uploads/nilutorusalenunefo.pdf
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/9d42e3402d4b077430519c3e23520d00/32582927659.pdf
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1608e9bb239c2f---magixedajat.pdf
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/e4af1c4e9e10bf445082de6ac3f05dd0/pirivepapoxemunozigige.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=class+12+accountancy+project+segment+analysis+reliance
    • 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_off000155a2.bin
8870d58623f768de8abfae3141c2646957c0c61c926e1543819146be98314772
pdf-font-stream PDF embedded font (sfnt) at offset 0x155A2 17972 bytes
font_01_sfnt_off00018551.bin
7f4ea663022b8584b75ef4ffad160d831bfdceee686d427eed3eaf66bf879f80
pdf-font-stream PDF embedded font (sfnt) at offset 0x18551 11264 bytes
font_02_sfnt_off00019feb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x19FEB 16792 bytes