Malicious PDF — malware analysis report

Static analysis result for SHA-256 150a1d32a1744c66…

MALICIOUS

PDF

82.3 KB Created: 2020-12-23 17:54:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 0a02f5690123ec5c96cd11d8aa758abf SHA-1: 9d8851cded15ae0266fdc920a03a57d7f82664db SHA-256: 150a1d32a1744c6614a6e8f57fd4ee90194a26f02d920683a8929c90b4fe3bf6
214 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 embedded links, many of which point to redirector infrastructure or potentially malicious domains, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the nature of the embedded links and the overall structure point towards a phishing or malicious redirection attack, likely delivered as an attachment.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/123?utm_term=directions+to+five+guys+burgers In PDF document text
    • https://cdn.sqhk.co/naritiba/hnhbicH/totally_battle_simulator_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391920/normal_5fafb90382de2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505326/normal_5fbbc1319e32c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414502/normal_5fa486db31d23.pdfIn PDF document text
    • https://jewojumafolu.weebly.com/uploads/1/3/4/6/134651010/rivotajulaki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420617/normal_5fd88655b2305.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367927/normal_5fa8ffa969975.pdfIn PDF document text
    • https://fojumujitugesi.weebly.com/uploads/1/3/4/6/134688065/dejaxizafad_zogiduwol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385217/normal_5fb9e41298253.pdfIn PDF document text
    • https://cdn.sqhk.co/dudazume/9jaehiP/cdf_vs_statistics.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwisagilevi/FWljhNT/go_kart_runs_rough.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10292 5108 bytes
SHA-256: a41e61f397e310150bc392dd975b4b26a5c60d800d1b5f6f09090caaadf50441
font_01_sfnt_off00011420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11420 11764 bytes
SHA-256: 321512717f81b68932eb1b77ac2cf0873702774dbe3fe116e681fcb6fa66b666

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