Malicious PDF — malware analysis report

Static analysis result for SHA-256 3058b1e6ac78cde9…

MALICIOUS

PDF

68.4 KB Created: 2020-11-30 09:15:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54cdd7f981e19db63d37be9a03f2b0f1 SHA-1: 9d093c1d901f99e482f93ef1d9cb7a16f3fdfa27 SHA-256: 3058b1e6ac78cde94906a21c80f1c3f72ce3d12cf85647e0eb004a19be9174ac
196 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a significant number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests it may also be used to trick users into providing passwords for archives, potentially to bypass gateway scanning. No scripts were extracted, but the presence of external links indicates a likely intent to redirect the user to a compromised or malicious resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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
  • 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
  • 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://trafffi.ru/123?utm_term=bluetooth+rc+car+controller+app
    • https://cdn-cms.f-static.net/uploads/4371261/normal_5f88b6164a8b9.pdf
    • https://kenilajapa.weebly.com/uploads/1/3/1/0/131069910/dfe5471fa8.pdf
    • https://fupomojokom.weebly.com/uploads/1/3/4/4/134458651/napaladadusetufugov.pdf
    • https://kibugaduxabe.weebly.com/uploads/1/3/4/5/134510017/fixabejiwuj-sijedul-xakimelewiwif-nasumemivo.pdf
    • https://xaxexapiro.weebly.com/uploads/1/3/1/4/131453807/81531.pdf
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/4555839.pdf
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/3a6af17.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/peveziwoguxuzam/2566255859.pdf
    • https://s3.amazonaws.com/dupula/wumexovabanapes.pdf
    • https://s3.amazonaws.com/xezujuxoz/38632365944.pdf
    • https://s3.amazonaws.com/fomaralunex/my_arms_big_adventure_quick_guide.pdf
    • https://s3.amazonaws.com/fexuror/connectors_of_sequence_worksheets.pdf
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce6e.bin
d251602f91cadceca38d29072154bfae3750cec5579a72cbf32e9626ef840372
pdf-font-stream PDF embedded font (sfnt) at offset 0xCE6E 4892 bytes
font_01_sfnt_off0000df0a.bin
ae10ca8022bc70e4f0d28d3b3d9657005494273bcc54e31d1cc4d72f497d353e
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF0A 10684 bytes