Malicious PDF — malware analysis report

Static analysis result for SHA-256 49b6e09ce756bbbd…

MALICIOUS

PDF

60.5 KB Created: 2020-12-23 05:36:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a2edd18c6cc88ec230dd8a1d52636e7f SHA-1: e2bd206eb279294870d666d336099dfd0aa35ac4 SHA-256: 49b6e09ce756bbbde9dca396be5101e369dabb23a86f31a198d42bee4616bc44
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many of which point to SEO-optimized PDF documents, suggesting a link farm or phishing attempt. The primary URL, 'https://trafffi.ru/strik?utm_term=weber+barbecue+grills+for+sale+near+me', is suspicious and likely leads to malicious content. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a phishing or trojan payload.

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://trafffi.ru/strik?utm_term=weber+barbecue+grills+for+sale+near+me PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419423/normal_5fa1ef86ed012.pdfIn PDF document text
    • https://sopizelofixafav.weebly.com/uploads/1/3/4/4/134438569/puzedumiran.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412900/normal_5fc54704c7732.pdfIn PDF document text
    • https://daxexamuve.weebly.com/uploads/1/3/4/4/134446800/f9a719.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421199/normal_5fc080c51959e.pdfIn PDF document text
    • https://guzebiba.weebly.com/uploads/1/3/4/3/134368687/6239010.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448103/normal_5fcc255c8e2f9.pdfIn PDF document text
    • https://wofexexugov.weebly.com/uploads/1/3/4/3/134318452/5044857.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366010/normal_5fe2378624a00.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/vojapu/belling_electric_range_cooker_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/ife_threats_for_cameras.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/2185744643.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/hernia_inguinal_slideshare.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/auto_tune_free_windows_10.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_off0000b29d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB29D 5352 bytes
SHA-256: a2e38ca913f9beaced6632ce75733f25b08f1c52039e323a54ef16c9864afdc6
font_01_sfnt_off0000c4ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4CE 9488 bytes
SHA-256: 9880e926f7c1b264d6c8c6bf1ed36bd0e0bc568d454fd8a45dd5c713d28c1aee

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