Malicious PDF — malware analysis report

Static analysis result for SHA-256 0034e49860d85b5a…

MALICIOUS

PDF

65.3 KB Created: 2021-06-15 11:32:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 847c3fb13d79ba0dfacc17b37427470c SHA-1: c18c5d20d1645501569c2b775dfc9f6f6a4a7358 SHA-256: 0034e49860d85b5a88e9b0d5170a1d8b39a8a9ad45586b0b6038054feab2f0d6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many hosted on compromised WordPress sites, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the presence of external links and the overall detection profile point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ketchas.ru/uplcv?utm_term=pdf+to+xml+converter+free+download PDF link annotation
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160be93ac5d160---16024431668.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081178b0bb49---27152486582.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090b917e0db7---96125552825.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/r7hqrk2t56iabqsqpq3ogpdsn7/senowidegidubujokirewi.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/b3igied0io2th4ce9c2pbrjs26/doxevikapa.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/f0a2c4ed3f6d73fcd6a75737288dfe54/88443648547.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a9cdd17aab0---zorapisufuzazeruv.pdfIn PDF document text
    • https://cochleartudaskozpont.hu/files/kidalelaxumuviwoded.pdfIn PDF document text
    • http://gtshotel.it/images/file/37642119638.pdfIn PDF document text
    • http://planetamama.ru/files/file/manoduvuzijonowevuwevo.pdfIn PDF document text
    • http://bbfrontedelmare.com/userfiles/files/guseloxizuwosujozezedomam.pdfIn PDF document text
    • http://alfavit.tv/userfiles/file/pomeboragufoje.pdfIn PDF document text
    • http://suamayin.biz/userfiles/file/41957827528.pdfIn PDF document text
    • http://brukbet.com/user_images/file/sidamininikojaxexog.pdfIn PDF document text
    • http://archi1919.com/smlclub-files/file/pudinufuxoli.pdfIn PDF document text
    • https://mszukam.pl/dat//file/27079262319.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4ff395768---wusotujezamipagilafefu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3D5 5212 bytes
SHA-256: ceee7e19f12a30028004ccfeff4b2ab34f471baeace01606cfc0d57187cf3c42
font_01_sfnt_off0000d58f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD58F 9720 bytes
SHA-256: b8967aeb71ea1279082746ac01961ed644a013c5c33892861e301e46fa1346c7