Malicious PDF — malware analysis report

Static analysis result for SHA-256 b47bb7687b85bb38…

MALICIOUS

PDF

60.0 KB Created: 2020-11-09 22:24:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 406eef69d283f2ffcdfce8d67a7ff6e9 SHA-1: 2b97d38e2709fa769eb4bf6e7207b07ae88387a9 SHA-256: b47bb7687b85bb38c4fa15d25edd0b1913eabb46a78da82f625ae2cbef25e848
156 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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/123?keyword=call+of+duty+best+trick+shots PDF link annotation
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/potot-kuvexejoxis.pdfIn PDF document text
    • https://panidulupeju.weebly.com/uploads/1/3/0/9/130969186/nizibebolutejil_banifu_wavizadarifoko.pdfIn PDF document text
    • https://kalabuzamebuku.weebly.com/uploads/1/3/4/3/134339718/mexenu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463263/normal_5fa490aae018c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369783/normal_5f8aefe8890af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377679/normal_5f998931ed441.pdfIn PDF document text
    • https://duxepanakotijek.weebly.com/uploads/1/3/4/3/134340233/kidevo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372073/normal_5f8c72fd19072.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/safago/26063265555.pdfIn PDF document text
    • https://s3.amazonaws.com/potevip/zitopubapimog.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/kizajewovulerimazezina.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_off0000ae8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE8D 5320 bytes
SHA-256: 8a98e9d06261a8bc1f56476e9b29ceed555c6d84dfa118107083fe23671a4aaf
font_01_sfnt_off0000c0a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0A3 10232 bytes
SHA-256: 9ea41175b2fe2e874e37360e909578c9b4a4f3e2bf9393ea348985629186d903

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