Malicious PDF — malware analysis report

Static analysis result for SHA-256 74e55fafae49515a…

MALICIOUS

PDF

85.9 KB Created: 2021-07-01 20:46:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: c1dcee135d59130f8d4f1e51dcfb1921 SHA-1: 7f673b6bbb2afe651a9b83a0adc326b44fa49ad9 SHA-256: 74e55fafae49515a95fd52dd647965e5b303ca3138ce3f7da527597e40e7226b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV detecting it as Pdf.Phishing.Trojan. The file contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm intended to redirect users to malicious content. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://alexanderjamesbackcatalogue.com/userfiles/file/kekotomurepekegomevemukin.pdf In PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c517ad512e4---68478822243.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/50f2967254b612d7f7fab324d0ccf433/72287282051.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160dc6897e7d50---bevagajibet.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/cps164g7v8uqsf2cmogsku84pp/90698763693.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/c1ec7a313db473a34ce41e37095aae4a/tamudamisedopuparofonon.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/88708856101.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/oqeos3u1gjq8h14a1ta6vn92rf/938252818.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/udpbjtumjfq1glke67rrfes39q/72608624341.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/10g5hrm2mnr1af130ff6g55lu6/novafifame.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/ilsekuejgoc89sf13kvh6bl4u7/xadaj.pdfIn PDF document text
    • http://urparitet.ru/admin/ckfinder/userfiles/files/96196210819.pdfIn PDF document text
    • https://teenvolunteerhouston.org/wp-content/plugins/super-forms/uploads/php/files/0b7aa4174db26ef29f5cee2845e44caa/bezemulotogemi.pdfIn PDF document text
    • https://sonarmusic.hu/up_image/file/74940655946.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/1alfck6ra9c1hejre6rm19rrgk/xakamavasomipexagunuroluz.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/ninegamogafu.pdfIn PDF document text
    • http://cp-1.ru/userfiles/files/punelamepa.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5a9383383---radiridumunikif.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd20cbfe66---jesajegulodaraguleja.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3284dee1c---mokax.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1607947639c9ca---87027669968.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd8583934fa---51049632498.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079adf01ac7c---temivunawi.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/a3958c027ce9ce4e6f806d6c28803e86/fuvisuwulesexepejetojogi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=vnc+viewer+free+editionPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED13 10216 bytes
SHA-256: 5177953573c712f55216c4a8057282782ac7b6d01adadfe15f1d268e99696f5a
font_01_sfnt_off00010423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10423 17164 bytes
SHA-256: 9721b88605c8e7bd5f42dc30e4a0e1ad094cb0553bbd5ef5466b167df7bd68dd
font_02_sfnt_off000130d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1