Malicious PDF — malware analysis report

Static analysis result for SHA-256 67410e4e601d49db…

MALICIOUS

PDF

67.4 KB Created: 2020-11-26 07:47:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46d0824cdf113d859fdfb46f0d9b6697 SHA-1: 16d881bb9fe26e68526c6483bd4f7def811eeeb0 SHA-256: 67410e4e601d49dbcb24baaa84d275383c2751bae84d28e57de516acfd671bb4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, identified as a "PDF_SEO_LINK_FARM" heuristic, suggesting a phishing or spamming campaign. The primary URL `https://traffine.ru/strik?utm_term=environment+health+and+safety+manual+pdf` indicates a lure related to safety manuals. ClamAV detection and ML classification confirm the malicious nature of the file, likely serving as a phishing document.

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/strik?utm_term=environment+health+and+safety+manual+pdf
    • https://nojilanoxejajej.weebly.com/uploads/1/3/4/8/134856497/491d6a2d17ff8a.pdf
    • https://cdn-cms.f-static.net/uploads/4370280/normal_5f8abfd50e72d.pdf
    • https://cdn-cms.f-static.net/uploads/4370275/normal_5f8cecc81a379.pdf
    • https://cdn-cms.f-static.net/uploads/4407988/normal_5f9d95b2566c9.pdf
    • https://cdn-cms.f-static.net/uploads/4498842/normal_5fac5e8470543.pdf
    • https://cdn-cms.f-static.net/uploads/4419828/normal_5fbf09ef4b79c.pdf
    • https://gamidilagadam.weebly.com/uploads/1/3/4/3/134339960/9698303.pdf
    • https://cdn-cms.f-static.net/uploads/4446489/normal_5fbbda0461833.pdf
    • https://sijevunima.weebly.com/uploads/1/3/1/8/131859613/bd46b06141c32.pdf
    • https://cdn-cms.f-static.net/uploads/4460243/normal_5fad7dea8b931.pdf
    • https://mabudorowux.weebly.com/uploads/1/3/4/4/134458492/86dde35.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dusined/bileiklerin_formlleri_ve_isimleri.pdf
    • https://s3.amazonaws.com/bededuxotulapil/35247904562.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_off0000c9cb.bin
74ca1564b51de85fa82864f4bea9fbbc1138a9ed1533a42a3d011848ba7793e3
pdf-font-stream PDF embedded font (sfnt) at offset 0xC9CB 5400 bytes
font_01_sfnt_off0000dc11.bin
0885ec1595190c4de065fa682a127b30f182aaaa6ddab83fed6e5b4ae63d7e93
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC11 11136 bytes