Malicious PDF — malware analysis report

Static analysis result for SHA-256 83b68baac094b4c3…

MALICIOUS

PDF

129.4 KB Created: 2021-02-13 08:42:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 612a78df157172a81c8768455c5059a4 SHA-1: 11ac7ddfbdbabe5728620dbe848f7d07eb4eacb1 SHA-256: 83b68baac094b4c32c3acfae7bbc36969bfac966acaeef6a200eab9c325a6a0c
174 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically 'https://crophysi.ru/wix?keyword=warlords+call+to+arms+hacked'. The ML classifier also strongly flagged this PDF as malicious. The presence of a callback lure heuristic suggests a phishing or tech-support scam pretext, aiming to trick the user into interacting with the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://crophysi.ru/wix?keyword=warlords+call+to+arms+hacked In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367302/normal_5fe9fc7fd120a.pdfIn PDF document text
    • https://cdn.sqhk.co/murajefovel/dl4hbhc/matometiburuvopinugosoboj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466146/normal_5fd6608b039dd.pdfIn PDF document text
    • https://cdn.sqhk.co/xakutofi/jha0sKb/vebopavabitavoxedij.pdfIn PDF document text
    • http://puwonasomoso.22web.org/vajepedo.pdfIn PDF document text
    • https://cdn.sqhk.co/puwidebudojo/ibahigf/webojatelijum.pdfIn PDF document text
    • https://cdn.sqhk.co/kewukapugino/1Jjb8Iq/ruzonasum.pdfIn PDF document text
    • https://cdn.sqhk.co/wefekoferu/Wnshbgf/kipegaguj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530578/normal_6021d042dada4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472760/normal_5fdff9161ab57.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466161/normal_5fcd31ae9d60c.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/livivuvuwugeb/qatar_airways_flight_ticket.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/93258605451.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/infographic_templates_free_powerpoint.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/a_full_form_in_hotel.pdfIn PDF document text
    • http://dofenepebasep.epizy.com/20712597847.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_off00019e0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19E0B 9988 bytes
SHA-256: 34d5310c449193474de8b09358160079784f55b87a3582671baca5fa130e4fb4
font_01_sfnt_off0001befb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BEFB 5256 bytes
SHA-256: 2928d4eb57f27db0a62400871c4ad526811535602037e3ef232d7d610650bde6
font_02_sfnt_off0001d0b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D0B2 11452 bytes
SHA-256: ea8827469f3716825ffd537fb275937c84bbe1116bd3e6b584e489b6018208a9

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