Malicious PDF — malware analysis report

Static analysis result for SHA-256 947501df00e69fd3…

MALICIOUS

PDF

75.2 KB Created: 2020-11-14 20:10:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b1c97790210a04d3724e73ee51945bdf SHA-1: 1a2cf3738ee98663466fd7503f096b83b365bbc0 SHA-256: 947501df00e69fd37de6959200dbae128cdb843f314b1c6dae10362e9dc0b8d4
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trafftec.ru/aws?utm_term=crash+course+french+revolution+answers PDF link annotation
    • https://damijuvik.weebly.com/uploads/1/3/1/3/131381376/jopititamazisag.pdfIn PDF document text
    • https://jatilesaza.weebly.com/uploads/1/3/4/3/134316516/942c14799ca7c52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388178/normal_5f90bc9e38db4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381082/normal_5fa6e9b467f60.pdfIn PDF document text
    • https://jesezexesupozor.weebly.com/uploads/1/3/4/6/134623998/9507577.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381964/normal_5f9698aeca722.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378175/normal_5f8e2df849d5e.pdfIn PDF document text
    • https://nalabusapigo.weebly.com/uploads/1/3/2/7/132740218/7064237.pdfIn PDF document text
    • https://vapesokon.weebly.com/uploads/1/3/4/3/134329795/4561aa4.pdfIn PDF document text
    • https://najuxobetejip.weebly.com/uploads/1/3/4/2/134265875/kovas-nasolo-lebotedade-jetewi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403121/normal_5faf53956bc97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375077/normal_5f93177a78494.pdfIn PDF document text
    • https://lawamikakemudi.weebly.com/uploads/1/3/4/4/134477295/a8addbaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365567/normal_5fa731ad7c3ae.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE725 5028 bytes
SHA-256: f87324dd61ba4edccf4c186e7027235ce4775ca07f6e7ab3de1d0efd5a5c1b7f
font_01_sfnt_off0000f84a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF84A 11984 bytes
SHA-256: 8fd38bd19cb9712c5ad4138d7474d944530b280a19b078efbe0a95cc7b904f6c

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