Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e90f869321081e6…

MALICIOUS

PDF

76.2 KB Created: 2020-11-13 15:56:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 1582f44c834e58996c0745ae86fe5663 SHA-1: b03bbcbffb18254b51f6c8cd7ffbaf9b1a6c1fde SHA-256: 6e90f869321081e61103b3e08b591348488fab3d9db5a93a7fd38d791f21a773
254 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, with one critical heuristic identifying it as a PDF link farm designed to redirect to malicious infrastructure. The presence of a link to 'traffmen.ru' and the overall structure suggest an attempt to direct users to potentially harmful websites. The ML classifier and ClamAV detection further support its malicious nature, indicating it's likely a phishing or trojan distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/aws?utm_term=cpwd+engineer+full+form In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367911/normal_5f898a24e9f24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412183/normal_5f9f05d57d354.pdfIn PDF document text
    • https://palozemoxapido.weebly.com/uploads/1/3/4/3/134366311/580176.pdfIn PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/d8997e6decbee90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367627/normal_5f8a5c8916f6e.pdfIn PDF document text
    • https://mebavowu.weebly.com/uploads/1/3/4/3/134353315/tusunomozi_poxetopi_fifano.pdfIn PDF document text
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/fakedazojusuvira.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366327/normal_5f90ede5dff2c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/baa8551a-2e06-4d48-9064-b0e7d6df39bc/pokemon_gba_roms_fan_made.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/876f9f89-d149-44a0-97c6-040b6ce6d13a/95243326991.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_off0000dff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF8 4968 bytes
SHA-256: 0bf6b7e042e28e38a1b92352eae876b738d8e39f89fa9931727757c6cd1d06c5
font_01_sfnt_off0000f0df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DF 10304 bytes
SHA-256: ffbbb64ecfabfff905dbb409a2fdce63339379bd009a5a27f346f291432b414c
font_02_sfnt_off0001147c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1147C 4024 bytes
SHA-256: fb32806f345aa5a03c9045c414d63c6dbf5a04824db82d0cefd4aa44b6a8180a

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