Malicious PDF — malware analysis report

Static analysis result for SHA-256 f02de6225fb1516d…

MALICIOUS

PDF

83.3 KB Created: 2021-02-22 19:51:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 92939f95b9d8649467975cbaeafd2a01 SHA-1: 706ba348cd65a006ca1bfc0b15f588b716771b0b SHA-256: f02de6225fb1516d708a2cebed3297c6155ee6e115da05b42632abcd2494bb90
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to disposable domains and potentially malicious redirectors, as indicated by the PDF_SEO_LINK_FARM and PDF_MALICIOUS_REDIRECTOR_LINK heuristics. The ML classifier and ClamAV also flagged this PDF as malicious, suggesting it is part of a phishing or malware distribution campaign. No scripts were extracted, but the link farm suggests a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=barn+burning+murakami+espa%25C3%25B1ol+pdf In PDF document text
    • http://latomixoxa.iblogger.org/81186153502.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407100/normal_5fde752cef595.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366304/normal_601dabf99d6dd.pdfIn PDF document text
    • http://lidobexi.22web.org/tyt_th-9800_usb_programming_cable.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411926/normal_5ff06261667a7.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/hjnjj9P/76323746705.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443821/normal_5fd632b1cd448.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzufoxo/5S7hdif/mexaredofasapajedusezi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473632/normal_5fd673082a2c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403118/normal_600d16bc5c918.pdfIn PDF document text
    • http://xofajenakimexo.iblogger.org/free_art_certificate_of_authenticity_template.pdfIn PDF document text
    • https://cdn.sqhk.co/bazexolareja/crh9jc7/instagram_follower_boost_app.pdfIn PDF document text
    • https://sowikidorazeku.weebly.com/uploads/1/3/5/3/135306740/faffcd732c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484612/normal_5ff808ee2176b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455375/normal_5ffc17e1a6d6c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fukorow.epizy.com/20830035516.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://www.aladin.co.krIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C5 4908 bytes
SHA-256: d8fb0648133deb5ef3551c5540bae27b862b24c13f907268a069280122dc8dae
font_01_sfnt_off000105cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105CB 5828 bytes
SHA-256: 1f5dd6ad775afe29f4ace3303886bd1d4a24d88f0ef82eb807f9a92d70f769dc
font_02_sfnt_off0001194e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1194E 10568 bytes
SHA-256: 9e77070ca4dfea1c6db8300ac1dae525dbd28f94dfe956317b5c379a95bd34ce

Open this report in the interactive analyzer, or submit your own file for analysis.