Malicious PDF — malware analysis report

Static analysis result for SHA-256 5502e28069e1fa89…

MALICIOUS

PDF

65.6 KB Created: 2020-12-21 23:58:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: cde58641e7a4bd654abc68b97ff0cde4 SHA-1: 38112a324d6d23aa740ab1e5385405b0d047daa7 SHA-256: 5502e28069e1fa89a086b86238fbd6f47e1516a5836d9d458fc799441d3ee1b7
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://traffnew.ru/strik?utm_term=i+am+hero+afk+tactical+teamfight+guide PDF link annotation
    • https://kaxogirigajel.weebly.com/uploads/1/3/4/6/134611066/261b4.pdfIn PDF document text
    • https://joguputip.weebly.com/uploads/1/3/4/6/134681535/tegasizarurodef.pdfIn PDF document text
    • https://zepitobazelaki.weebly.com/uploads/1/3/4/6/134619491/bavila.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384144/normal_5f9ea8e4c26c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374372/normal_5fc238bdb8e51.pdfIn PDF document text
    • https://webegerux.weebly.com/uploads/1/3/4/7/134759049/ratubuxolu_varanisaze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418981/normal_5fb99e927a7ff.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc781ca58762305c0f8fbfb/t/5fc818f3dcb5b260796de07d/1606949108003/rojev.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4da975bcb0228a29bc7b8/t/5fca4ccf196a600d3c3f6196/1607093456278/luke_combs_new_album_songs_youtube.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/retemexusonitarevadumiro.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf5b9b474932ca266e426/1606219199835/kafaxutakenedipabupaj.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf48cf145a8629dca70556/1606371535975/53349505700.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4ece785-0697-4ac4-a2e7-3dc4eea43fec/vinanudujef.pdfIn PDF document text
    • https://s3.amazonaws.com/muvunekagok/55875439075.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc72d5643c5ee75bf2ae53d/t/5fd0fe18f3b3412bde6c1c1e/1607532056973/anti_theft_alarm_for_motorcycle.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_off0000c21f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC21F 5260 bytes
SHA-256: 025e7d2c9d0e6c2525f9ff28521216285c554f529c279d12e105f022cfd09aab
font_01_sfnt_off0000d3da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3DA 10580 bytes
SHA-256: 048aa977be5eb9f09cab5f044c957ed2114490ced5e1c1729d53542f7a7e1191

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