Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5872439f9fb2c38…

MALICIOUS

PDF

96.6 KB Created: 2021-05-06 01:58:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 871345c72a1bb46810045bb71c5bf3ca SHA-1: 983f28f2e61e64e7f8bde78df609abae1bcfa753 SHA-256: e5872439f9fb2c385867c829a2ea5d7ae04b841835417cf589f695b35f31f8e2
146 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URI points to a suspicious domain, 'fokemale.ru', which is likely part of a phishing or malware distribution scheme. The document's structure and the presence of numerous links suggest it functions as a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://fokemale.ru/strik?utm_term=alfred%2527s+piano+methode+voor+volwassen+beginners+2+pdf PDF link annotation
    • https://cdn.sqhk.co/fopavege/Ljj2vgd/migurigusogojojaki.pdfIn PDF document text
    • http://tuwimig.scienceontheweb.net/fetumazokubezin.pdfIn PDF document text
    • https://cdn.sqhk.co/tumosirewuw/fClLkr9/sidegitegepozazunotugoreb.pdfIn PDF document text
    • https://cdn.sqhk.co/jarixizotib/ejjeYnQ/95634231942.pdfIn PDF document text
    • https://cdn.sqhk.co/vedasukuki/Cggggji/dazizizezamupokatupijabe.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxomawelej/i2gf8ha/41922132702.pdfIn PDF document text
    • https://cdn.sqhk.co/womilepeba/azLRQij/kaiser_permanente_jobs_washington.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/a152292b-9d70-4aea-9673-b17d25bf42e7/menulosuwumu.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/tukejebunolutalejufez.pdfIn PDF document text
    • http://luvibiw.epizy.com/gonisodidaruxelapikowi.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/xijurubetonafutovapujarad.pdfIn PDF document text
    • http://tamikukezinubi.rf.gd/35260160904.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13ebcf86-a280-4d75-8d7b-fe39c4bd8efa/43566128107.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/ms_driver_license_renewal_appointment.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/gadipokodu.pdfIn PDF document text
    • http://tugojan.rf.gd/anglo_norman_literature.pdfIn PDF document text
    • http://newemepakirid.myartsonline.com/a_grief_observed_free.pdfIn PDF document text
    • http://sajulugebimisu.myartsonline.com/15428277576.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ee99188-5420-4392-8558-310b6604713b/frigidaire_washer_dryer_combo_not_drying.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12558 5688 bytes
SHA-256: 5eb1076b6d19a71322c02de984ada0c33cf2fa632b1b7ed5c28021758f43516e
font_01_sfnt_off00013898.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13898 13672 bytes
SHA-256: 19823f0e498197638e079322eb13cc2368dae009234b879a371f6dfa973a879d
font_02_sfnt_off0001649b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1649B 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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