Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fac4e6aeccfed67…

MALICIOUS

PDF

82.4 KB Created: 2021-01-03 21:56:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e627320410743d9366406b6e716fe78e SHA-1: caaea8aea91dfcc901bc280a42caf910d38ba7f4 SHA-256: 9fac4e6aeccfed67518d1eb39b697e1bf34d30842bdb36c7b6e4e9c926553431
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, identified as a link farm, with the primary suspicious URL being https://traffset.ru/123?utm_term=the+convenient+groom. This suggests the document is designed to redirect users to potentially malicious websites. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links strongly indicate a phishing or malware distribution attempt, aligning with T1566.001 (Spearphishing 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
  • 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/123?utm_term=the+convenient+groom PDF link annotation
    • https://cdn.sqhk.co/gutemokerezo/gjgjgfm/primal_legends_gift_codes.pdfIn PDF document text
    • https://cdn.sqhk.co/ranuvore/jfFugc6/bofepasuvatajel.pdfIn PDF document text
    • https://rumikupim.weebly.com/uploads/1/3/5/3/135310872/zolabowager-jibasap-vexis-wizulaju.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/JY3khfb/toolbox_for_minecraft_pe_1._16._40.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454281/normal_5fec1f178f15a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380382/normal_5f9154ee0e57b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367680/normal_5fa6cedab9fe3.pdfIn PDF document text
    • https://cdn.sqhk.co/wepaxuwelusu/hjjfEjd/89567331593.pdfIn PDF document text
    • https://bodupakodekafas.weebly.com/uploads/1/3/2/6/132680796/kelotatebusesa-rimujubed.pdfIn PDF document text
    • https://cdn.sqhk.co/momebuman/pigWjcd/world_war_2_books_fiction.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368245/normal_5f98554a9b6f0.pdfIn PDF document text
    • https://cdn.sqhk.co/loxowopiv/jgBHYjg/hd_movies_2021_watch_movies_free.pdfIn PDF document text
    • https://cdn.sqhk.co/nutanujel/jekLlDv/xosope.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/00a10e3c-a3da-4c8e-9ab3-49d48cfd9226/witch_of_blackbird_pond_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18ecde2a-853d-4d2d-93b8-cd15cf61f985/65322929780.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_off00010893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10893 4804 bytes
SHA-256: 3aa2ce0b2fc130ced2d608d80783177a49d561e4a8476cbae6a63ac15efae687
font_01_sfnt_off000118cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118CC 10656 bytes
SHA-256: ae1fc00851351a8e1619924012f9dd3592dcf191ea36275eab9c269bd5b25d66

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