Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b3ede4c99e66cc9…

MALICIOUS

PDF

80.8 KB Created: 2020-12-27 08:19:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 5609d4fc67016ca47aeefbe63e304974 SHA-1: 7572af5e718be17d175341875073448cb52be6d7 SHA-256: 5b3ede4c99e66cc9ec8e1696dadfebffef2ba3d5837130750985eb56f6f6965f
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier, indicating it is likely a phishing or redirector attempt. The document contains a large number of embedded links, many pointing to potentially malicious redirector infrastructure, designed to lead users to harmful websites. No scripts were extracted, but the primary attack vector appears to be the extensive use of deceptive links within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffmen.ru/123?utm_term=quitclaim+deed+michigan+after+death In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365627/normal_5f870321509a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369900/normal_5fab95de2178b.pdfIn PDF document text
    • https://zosupexaduj.weebly.com/uploads/1/3/0/7/130738593/1290736.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470979/normal_5fceb8599c2d8.pdfIn PDF document text
    • https://worubagazew.weebly.com/uploads/1/3/4/6/134639575/6454fa7865b.pdfIn PDF document text
    • https://cdn.sqhk.co/remudejifi/jhiEgeB/fire_boat_simulator_3d_hack_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/tegatiwuwax/ghchhjg/air_hockey_pucks.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380078/normal_5fa62bc031355.pdfIn PDF document text
    • https://cdn.sqhk.co/rejibebadit/R1TBpOJ/bawosidijowonofarezubo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450415/normal_5fd0d67f7e8f5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444877/normal_5fc65a5ab1376.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460055/normal_5fc30446af152.pdfIn PDF document text
    • https://cdn.sqhk.co/gujadozede/q2cjeOf/resop.pdfIn PDF document text
    • https://cdn.sqhk.co/lawafopugu/fKChaja/welaxaneriwuze.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/92b88314-7dd0-482e-8666-954f213bb108/kuwodafewenit.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/jubeva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e013840-aecd-4890-87b1-06f0a36259d4/o_tao_da_fisica_livro.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_off0000ff78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF78 5316 bytes
SHA-256: 2cdaf7a01e2311ca8d852c3d698434b4dc5131b58df6e888214f877be32a067c
font_01_sfnt_off0001116a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1116A 10728 bytes
SHA-256: a7979c84dc27ae91502d5edbffc80722a595f3bb672b90bd966aa946306b2da1

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