Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a5e7d8aab9c19c8…

MALICIOUS

PDF

70.5 KB Created: 2020-11-18 07:53:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26c0762a77514cdefa4f7e1049334d28 SHA-1: 143b1808139ec37e6288940b8ef03d55b22a69f9 SHA-256: 0a5e7d8aab9c19c8206de291b04913e026d347b3ca85e9795e8ef670bb957b2d
156 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing or malware distribution lure, as indicated by the 'PDF_SEO_LINK_FARM' heuristic and numerous embedded URLs. The document body, though partially corrupted, suggests a 'curriculum vitae' theme, a common pretext for social engineering. The presence of multiple external links, including one to 'trafffe.ru', strongly suggests an attempt to redirect users to malicious sites or download further payloads.

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://trafffe.ru/aws?utm_term=curriculum+vitae+formato+mexico
    • https://cdn-cms.f-static.net/uploads/4393019/normal_5fa642f3f0bb1.pdf
    • https://cdn-cms.f-static.net/uploads/4404990/normal_5f91f036eac5b.pdf
    • https://xapowukugo.weebly.com/uploads/1/3/4/7/134702937/583242.pdf
    • https://cdn-cms.f-static.net/uploads/4369522/normal_5f88e6196f332.pdf
    • https://cdn-cms.f-static.net/uploads/4365547/normal_5f870af12352c.pdf
    • https://nijubalalo.weebly.com/uploads/1/3/1/4/131453980/5228029.pdf
    • https://xogofodaromaf.weebly.com/uploads/1/3/4/3/134387758/sijivodidiw.pdf
    • https://cdn-cms.f-static.net/uploads/4480393/normal_5fb2d3f01b12a.pdf
    • https://jogofevizu.weebly.com/uploads/1/3/4/3/134348232/5077149.pdf
    • https://cdn-cms.f-static.net/uploads/4371553/normal_5f8a0dc731e80.pdf
    • https://cdn-cms.f-static.net/uploads/4381759/normal_5f906cc73abf7.pdf
    • https://xabisemegebo.weebly.com/uploads/1/3/4/4/134491474/pavitubog.pdf
    • https://jorimedazaget.weebly.com/uploads/1/3/0/7/130738946/6697967.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/94aa6e80-0a0e-4847-bdb7-9f6890450be9/58451799100.pdf
    • https://uploads.strikinglycdn.com/files/5ce29aea-b608-48ef-83ef-d8a7b1eb22d8/35287630095.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_off0000d4c4.bin
4b29e2a7eea6845fa11371db2f88e24ec0dce571f5032b9f366114273d026813
pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C4 4880 bytes
font_01_sfnt_off0000e550.bin
68b539aabb453537ff28bf1676cef35f53b46f49aa4c1c86f08197fb9ae28cef
pdf-font-stream PDF embedded font (sfnt) at offset 0xE550 11360 bytes