Malicious PDF — malware analysis report

Static analysis result for SHA-256 72e18cdf7aea36c9…

MALICIOUS

PDF

78.0 KB Created: 2021-02-20 18:51:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 873e3df4f3ab25a8e54de01efd3dd601 SHA-1: 1a2a04520d28d26b6024e98d5231aec5e70f5e7f SHA-256: 72e18cdf7aea36c9b1bbf1d904610ed5725af9e958684a012d075874118e8e06
206 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics indicate it functions as a lure for credential harvesting or MFA abuse, and also as a payment redirection lure, consistent with business email compromise tactics. The embedded URLs point to disposable hosting and redirector services, further supporting a phishing or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://jottigo.ru/strik?utm_term=stack+on+gun+safe+keypad+not+working PDF link annotation
    • http://segikusi.22web.org/wugagidirolufazujubeduta.pdfIn PDF document text
    • http://forkidsshop.online/bopumafuselesasaa6dw4.pdfIn PDF document text
    • http://copyrightsafetyhelps.com/vikofowoboferg9d3a.pdfIn PDF document text
    • http://soul-felt.com/36525097913b1i0s.pdfIn PDF document text
    • http://jojonavakuxuf.iblogger.org/gerund_and_infinitive_quiz.pdfIn PDF document text
    • http://auto-agents.space/the_heart_of_darkness_charactersj9e3o.pdfIn PDF document text
    • http://gelivebun.22web.org/82449406082.pdfIn PDF document text
    • http://sqrab.top/surefarekiwusigosewexib9hpt.pdfIn PDF document text
    • http://acupofjacob.com/78227674545e9cya.pdfIn PDF document text
    • https://penizamuravepu.weebly.com/uploads/1/3/5/9/135976181/xasibos_fukuzibuti_busixa.pdfIn PDF document text
    • http://ketousa.site/tangle_teezer_walmart_usa7zhc2.pdfIn PDF document text
    • https://pitisugokusibim.weebly.com/uploads/1/3/4/4/134445344/2d7b1e.pdfIn PDF document text
    • http://technodom11.com/nutritional_information_bacardi_white_rum7hvk1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/allison_1000_transmission_parts_catalog.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/15505399222.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f18a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18A 5652 bytes
SHA-256: 3f6a9fccc034b5948970d70c37aaacd6c1172d0b5961c24c9ac270354d54deef
font_01_sfnt_off000104fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FE 11204 bytes
SHA-256: f144baa10b9c3c2dc7a85649a4e26ad50e1c3d0c06eacab93b9cc443d11c6459

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