Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e8d30d2638e50c6…

MALICIOUS

PDF

80.6 KB Created: 2021-04-03 17:33:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf26a5d0e19f1c307aec5d4b25fd5a6b SHA-1: 9061435b1eac5cbbdcd9b193c25d2fab388e78e4 SHA-256: 6e8d30d2638e50c6e5206bab8ff31c5063bbeb0d0e6b7149c925dd249dea5e6e
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm, with one prominent URL pointing to zajinet.ru. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or a scam. Although no scripts were explicitly extracted, the PDF structure and extensive external linking suggest it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/strik?utm_term=how+much+to+service+a+honda+civic
    • https://cdn.sqhk.co/parabeset/icgcjib/leraxazazapotavajinikeku.pdf
    • https://wipedevibenisi.weebly.com/uploads/1/3/5/3/135315865/9980529.pdf
    • https://vedalamiru.weebly.com/uploads/1/3/0/7/130776143/c6c0fce25.pdf
    • https://static.s123-cdn-static.com/uploads/4447434/normal_600285eb1a409.pdf
    • http://finoginujowiwi.mypressonline.com/97249743588.pdf
    • http://homebig.space/business_communication_skills_training_in_dombivliwnzmd.pdf
    • https://cdn-cms.f-static.net/uploads/4403685/normal_604bbb25e7a73.pdf
    • http://jedomagisuw.getenjoyment.net/fatazirifelutagek.pdf
    • https://zitakutuseg.weebly.com/uploads/1/3/5/9/135994262/49325c.pdf
    • http://stixlife.info/momuputajifepojesofisnhtm.pdf
    • https://fapuwokezisojo.weebly.com/uploads/1/3/1/4/131453853/lutala.pdf
    • https://cdn.sqhk.co/rimudatige/0Sgjjha/nulonevaw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://4b523d79-2bc6-404f-8e52-0acae4d2cb03.filesusr.com/ugd/fe1b41_904b571bf3914193b36db192fe806feb.pdf?index=true
    • http://xuvekixofeku.onlinewebshop.net/what_is_brownie_the_elf.pdf
    • https://69f7c7ec-f776-4f8b-90c4-e8126cd531e3.filesusr.com/ugd/772020_023a1362ef42428e82149566aa1f31f7.pdf?index=true
    • https://4c80ca50-31de-4e6f-b265-471620011c4a.filesusr.com/ugd/08c6b7_05e2cee59e3c4711bb31aef5bb822ee0.pdf?index=true
    • https://02687da8-bf2b-436b-a8ca-82c6e04513a5.filesusr.com/ugd/e48f8a_942f5230d24249e185d4a859a57afab3.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f216.bin
62fcabf1056fdcdca155af47301a3654906d9836dfa63801d4bf586ff4d1baf9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF216 5144 bytes
font_01_sfnt_off0001037a.bin
a111cf044060df09c1145b114e94caab54e2a29c010c0dc00d311353cc7e16fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1037A 10600 bytes
font_02_sfnt_off0001277b.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1277B 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.