Malicious PDF — malware analysis report

Static analysis result for SHA-256 30a9dfc7f3e703e7…

MALICIOUS

PDF

67.2 KB Created: 2020-11-13 09:21:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: a1cb09717a63a299cabc9832c1f7b70f SHA-1: d728d30e0b5e49ca143b587081f7528beeb8952a SHA-256: 30a9dfc7f3e703e7fdcc56ec3ee7ac8797aec18634251b878d8d2a1fdc5f4187
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 0.9998

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/strik?utm_term=the+billionaire+2011+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392864/normal_5fad9db8db2b6.pdfIn PDF document text
    • https://vunisanelebori.weebly.com/uploads/1/3/3/9/133999195/12ac3c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368971/normal_5f89a06d5e207.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386365/normal_5fa38f749e0e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365657/normal_5f9006375f8c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427523/normal_5fa66417488e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416806/normal_5fa6b1b52ffaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488560/normal_5fae15df1d08f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457312/normal_5fa6d125dfa1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378845/normal_5f984004c7d11.pdfIn PDF document text
    • https://sojutobifedurex.weebly.com/uploads/1/3/4/5/134588439/3323050.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368956/normal_5f88a21e84abc.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/fowikorejodi/venunakopuloxawudewoxus.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/to_be_simple_present_tense.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/79420117212.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/59177063800.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_off0000c923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC923 5324 bytes
SHA-256: f4bdce37f9da500798b973de54d861b1a94d12ffb5112bd1886c0da23d2fc10d
font_01_sfnt_off0000db4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB4A 10704 bytes
SHA-256: c263fa8aee9fe0fccdf8393b1915578a93e7789cee844a6e7e15485933ab6981

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