Malicious PDF — malware analysis report

Static analysis result for SHA-256 5069657f1f706fee…

MALICIOUS

PDF

64.8 KB Created: 2020-12-30 02:40:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 5f315c98038a778825cb029ccaa16a26 SHA-1: bff5f854765a0a76cf9c1c5ed25080bff39c729a SHA-256: 5069657f1f706fee73c85b833cd8812d4224fdf1d41965259b6e14532ef99ca1
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many pointing to S3 buckets and other file-sharing services, suggesting a link farm or SEO poisoning tactic. The primary external URI, 'https://traffset.ru/strik?utm_term=speed+motorcycle+price+in+pakistan', is likely a lure to a phishing or scam page. ClamAV and ML heuristics also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffset.ru/strik?utm_term=speed+motorcycle+price+in+pakistan PDF link annotation
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/penajomamuw_sakoxulon_fasevi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412757/normal_5fb6de8d524af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381762/normal_5fd6372990293.pdfIn PDF document text
    • https://biwewijusegi.weebly.com/uploads/1/3/4/5/134586848/boruzopatifitiw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gavobawum/17029133762.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/86944657783.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/employment_contracts_australia_free_template.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/wozusapijefan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f11e9b55-dfa7-4810-a3ba-dcb961769c41/zirinejolofidibodosewetox.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/67657791847.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/sukawuvujose.pdfIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/offshore_fishing_report_delaware.pdfIn PDF document text
    • https://s3.amazonaws.com/zatazewoz/adverse_drug_reaction_types.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_off0000b4aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4AA 5276 bytes
SHA-256: 9a8345e1d0803d134798e6f4a6f26ff454988fd4660250c2862b491ef7605bea
font_01_sfnt_off0000c67f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC67F 9908 bytes
SHA-256: bf49b90f0cf76fe82dc3ad02cd93fbd227a36bfda8ba0e7c683ca1786afa80d8
font_02_sfnt_off0000e856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE856 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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