Malicious PDF — malware analysis report

Static analysis result for SHA-256 0618f3f2acf70459…

MALICIOUS

PDF

101.2 KB Created: 2021-05-14 13:12:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 29b904ef74d7436ab955efc4d0dbc057 SHA-1: 184cfbfa89548394d3c3ebeecb4da451487bb9a1 SHA-256: 0618f3f2acf704599a6295267592210625c2616a29354d147a8095207a42a8d8
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to artificially boost search engine rankings. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/strik?utm_term=manual+pedaleira+digitech+rp90+portugues PDF link annotation
    • https://cdn.sqhk.co/bufudoraxala/fF5Ehhk/63640610263.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500882/normal_602d5cfdd0e2c.pdfIn PDF document text
    • https://cdn.sqhk.co/tifobebe/c3RNggp/30864337467.pdfIn PDF document text
    • https://cdn.sqhk.co/rufetuzek/iJE9Ygg/free_piano_sheet_music_for_beginners_disney.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385631/normal_601671ea2fefc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/baxunaf/63998355752.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/vuxawexudetumimuju.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/40357473783.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b862bdaf-0c69-4ad1-aac8-7a3c33457067/gezinavekijuji.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/57010780420.pdfIn PDF document text
    • https://b634734f-67aa-4edc-9b69-dcf7610e4690.filesusr.com/ugd/c86859_1dc5f42e96b0496fb124d8a24cb5b1e5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/subopukomanaw/2005_bmw_x5_repair_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf27767f-9cfe-4124-9a0f-d5a6413dfba0/95288337760.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/66893540941.pdfIn PDF document text
    • https://48bf584d-d56c-45cf-b4f3-c1c05dce5274.filesusr.com/ugd/3f4b99_d6d4cbf6cb134a4f959fb875f6f277ec.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/34399491032.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012ece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ECE 2952 bytes
SHA-256: 6f6c5a8fb5e62cfd2b6ff76f758e0f05a98695d5bac735cd019a42cb5e5649ba
font_01_sfnt_off0001395b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1395B 5636 bytes
SHA-256: 581652de46bd3199ae29e41e94850a4299bc73d6cc19aa53508501aa1c188fc7
font_02_sfnt_off00014c8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C8A 19740 bytes
SHA-256: 2398405f6fe2f5f81eaf0fb02e1c75b0fe8a7997da62ca5527a6a41f4c47d05b

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