Malicious PDF — malware analysis report

Static analysis result for SHA-256 f00dd73a76c44938…

MALICIOUS

PDF

81.4 KB Created: 2020-12-30 20:17:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: ffc1459b27dfc5c459d79dc5b3e7e944 SHA-1: 7a97ba9c70a4a5ce31477165d1fde5811fb83a1b SHA-256: f00dd73a76c449389b7e550cb3f41af5708853d5d767fcfc409d6ef9238c934e
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, many pointing to benign-looking PDFs, suggesting a link farm or SEO manipulation tactic. One external URI, 'https://traffking.ru/123?utm_term=project+quality+management+methods', is flagged as unknown reputation and is likely the primary malicious destination. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffking.ru/123?utm_term=project+quality+management+methods PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405642/normal_5f9a1260cd1e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369629/normal_5f88ffb62ea30.pdfIn PDF document text
    • https://dugeditukuvil.weebly.com/uploads/1/3/4/7/134723955/gogiki_lovadizikegupa.pdfIn PDF document text
    • https://dorikorojuj.weebly.com/uploads/1/3/3/9/133987202/8238823.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420752/normal_5fa8f25e5d7c9.pdfIn PDF document text
    • https://vovikadu.weebly.com/uploads/1/3/4/5/134587732/3ccf269b8.pdfIn PDF document text
    • https://kusumuwuwudes.weebly.com/uploads/1/3/4/3/134338751/wotizolozuzudulelini.pdfIn PDF document text
    • https://ponokexagetax.weebly.com/uploads/1/3/4/3/134326843/a64340b4.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/kakef/learn_old_english_with_leofwin.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/zuverakuzagoseditufoxim.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/aws_cwi_exam_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/10931205327.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE483 5660 bytes
SHA-256: a24225a7bf022252a220dabf0a084cf2dc313106184b4f32e6726303c89b6121
font_01_sfnt_off0000f795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF795 13548 bytes
SHA-256: 3b8ca2968b62d7c3cb4ff6adefd7fa704ac854a1308e12f181c63be12748521a
font_02_sfnt_off000120ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120FF 16348 bytes
SHA-256: 4d0700c2bed8ae31e296ea143d862b5f4c90f99d2dd4e3a41f3daee297692574

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