Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e5f1832f0ee78b4…

MALICIOUS

PDF

89.0 KB Created: 2021-03-07 10:23:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 75b035cf1d591348e0acbb84d0ac14db SHA-1: 255da99c5ea252323f107fd8298f5f1be710c77a SHA-256: 5e5f1832f0ee78b469bf1b1c2cf98b363eba9b0a3f422cd5659d2084e3919a24
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. One of the embedded URLs, https://soxebez.ru/wix?keyword=innova+3300+multimeter+instructions, is likely part of this scheme. While no scripts were explicitly extracted, the nature of the PDF and its numerous external links indicate a potential for distributing further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://soxebez.ru/wix?keyword=innova+3300+multimeter+instructions PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426421/normal_6014820bba803.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421352/normal_6041d867d9ddf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407060/normal_5fdd28eaca659.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479439/normal_60415f9a6bc95.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/dBhjIAl/slifer_the_sky_dragon_yma-_en001_price.pdfIn PDF document text
    • https://wikefazopikevi.weebly.com/uploads/1/3/4/7/134715570/6f27b35.pdfIn PDF document text
    • https://cdn.sqhk.co/firumefetev/heF8Oig/super_clone_watches_for_sale.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498376/normal_602caff3473a9.pdfIn PDF document text
    • https://lozexisivebuzon.weebly.com/uploads/1/3/4/7/134702594/3a55d08.pdfIn PDF document text
    • https://cdn.sqhk.co/nujekezitifi/xjcRhdP/30752353142.pdfIn PDF document text
    • http://pay-order.info/pefolemufgmahj.pdfIn PDF document text
    • https://cdn.sqhk.co/junigofulum/hehgyNR/16010388482.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405193/normal_5fd678490090c.pdfIn PDF document text
    • http://pet-guru.shop/50717309395dmw1r.pdfIn PDF document text
    • http://copyrightshelpcenter.com/kaiser_mft_jobs_san_diegoks30p.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8dfdba76-182f-4dc4-9dda-37a8c8d09dc9.filesusr.com/ugd/4ae4db_bf04e679f383405bace9cba9b8348a5c.pdf?index=trueIn PDF document text
    • https://f3b8d348-8566-49c9-a9f8-a2c3b9e1bc8e.filesusr.com/ugd/f1c748_428e0dade75247f3b88e6dbbedeb7ad2.pdf?index=trueIn 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_off00011e66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E66 5248 bytes
SHA-256: 0ffd4e8859abee4553b2eaa26285a5078ffa81e3a93b4a9947a5d70469ebcded
font_01_sfnt_off0001302b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1302B 11452 bytes
SHA-256: e4450e9636c38304f4a4e35d3032bf5be9076f736ceb6390efaf40816f52ac89

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