Malicious PDF — malware analysis report

Static analysis result for SHA-256 74189e64f0baed91…

MALICIOUS

PDF

146.8 KB Created: 2021-09-07 13:59:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6b3797598d20d60afe11976fc0a64bdd SHA-1: 4ff5d2b31faf47e117823ce390aaa921d6308afc SHA-256: 74189e64f0baed91d8b56046f102a3d931e07bf09ed76eb00a2b486e282efc43
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document functions as a link farm, containing numerous URLs that point to potentially compromised websites or disposable domains, suggesting an intent to redirect users to malicious content or phishing pages. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 https://wastran.ru/uplcv?utm_term=mpow+59+headphones+manual PDF link annotation
    • http://vervesimuhub.com/userfiles/file/60533077797.pdfIn PDF document text
    • http://kopdesign.nl/userfiles/file/98731749244.pdfIn PDF document text
    • https://intekcanada.com/ckfinder/userfiles/files/vugozogibige.pdfIn PDF document text
    • https://aimtronu.org/userfiles/file/mobevajazidadatos.pdfIn PDF document text
    • http://dwallacelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dewaxefesutorosokutiz.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/7f83271d5c45a7ff40ebfea2a418ff62/dojumeponepidimefosodov.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/7a0d548e3862d924ba0942470e497c56/mufubetilutogosapegifijik.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/8a2302d822a541a51903fd2d378439e8/kuzuvubofek.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/g6reull09b36fm3uhu7f3bouha/147320786.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607443e8283b2---vuvivuxu.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/02c1b967e73c62a49e1e4f090f230937/90894809993.pdfIn PDF document text
    • https://strategieb2b.ca/userfiles/file/19076587548.pdfIn PDF document text
    • https://ddtoyz.com/ckfinder/userfiles/files/zowimotuwi.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160906b85f1364---julokipax.pdfIn PDF document text
    • http://austral-immo.com/userfiles/files/92249940250.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/1412617469d464af5e4fefd4be10bef2/vajejig.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c2529ad6f74---sudoxi.pdfIn PDF document text
    • https://china-glass-mosaic.com/userfiles/files/20210805_061547.pdfIn PDF document text
    • http://roocenter.ru/upload/file/didam.pdfIn PDF document text
    • http://kmkonsult.cz/userfiles/file/lobufunelopakiza.pdfIn PDF document text
    • http://sjhtractor.com/d/files/bemujopumuded.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/77d925ab45048f9da1ba521b8b035b3e/98544641910.pdfIn PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/17261406707.pdfIn PDF document text
    • 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_off0001d525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D525 21228 bytes
SHA-256: f7fc703d788578aca6048e178d2b4c62e68d0805a3bd6551fc2d3fe8a20ecef8
font_01_sfnt_off00020c2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20C2D 10848 bytes
SHA-256: 67649c13cc49427a8248e626f1f1a98b1f10d7266163b56810f4cd0a20918639
font_02_sfnt_off00022525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22525 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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