Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e01718daa3f5966…

MALICIOUS

PDF

78.9 KB Created: 2021-03-05 09:28:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 6a32fed806daf7cec17e1636b7ac06af SHA-1: 6cb602b61d574547ddb9fa0a6fe861ac1a5937f6 SHA-256: 1e01718daa3f5966370025881bac374c73c3e435d4bbc8c7ac777643d9e4a95b
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external URLs, including suspicious domains like mezovuduw.ru and trysalon.xyz. The document body, though heavily obfuscated, contains references to product keywords, suggesting a lure for SEO spam or phishing. No scripts were extracted, but the presence of numerous external links points to a redirection-based attack pattern.

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
  • 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://mezovuduw.ru/award?keyword=husqvarna+chainsaw+435e+price PDF link annotation
    • http://trysalon.xyz/90874108789e3bzk.pdfIn PDF document text
    • https://wozepunelom.weebly.com/uploads/1/3/5/9/135993859/motedutubofimi.pdfIn PDF document text
    • http://dosijefa.mypressonline.com/is_smart_scale_accurate.pdfIn PDF document text
    • http://nukicew.xyz/lenolelunukewebeveminakoclnl.pdfIn PDF document text
    • http://bonaletikireje.iblogger.org/essay_how_to_show_patriotism_in_malaysia.pdfIn PDF document text
    • https://guvorike.weebly.com/uploads/1/3/4/2/134266232/gakuzuwa.pdfIn PDF document text
    • http://bioforce-co.site/4025022109grypr.pdfIn PDF document text
    • https://jotigigej.weebly.com/uploads/1/3/0/7/130739509/6860923.pdfIn PDF document text
    • http://siankaanmexico.com/susivebebimejizeb6cxdo.pdfIn PDF document text
    • http://wupoluse.22web.org/jofajizamijuxuwe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d76e3ee-72e4-4ea0-8566-8af51f324cd8/tamuti.pdfIn PDF document text
    • http://vovakupalujum.onlinewebshop.net/ruger_lcp_22_magazine_capacity.pdfIn PDF document text
    • http://redifigikutusoj.myartsonline.com/tofonokaf.pdfIn PDF document text
    • https://f395d2f2-f939-483b-815f-81062d4747ff.filesusr.com/ugd/be2697_ece362d1c75d44869054a5d83f545100.pdf?index=trueIn PDF document text
    • https://8271b8e8-1520-4b18-8785-2fafc8cd33e6.filesusr.com/ugd/efc97f_bf5bbb85c28d4d548ffb2ee24699aa3a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ec696ce-91a4-4131-bb7a-5b1c676805ca/how_to_relieve_neck_tension_at_home.pdfIn PDF document text
    • https://5e3b32e6-a537-4a58-a531-ef303a468713.filesusr.com/ugd/120874_48c51918dec44d9aa852589bbc343c07.pdf?index=trueIn PDF document text
    • https://1c684d3d-b1aa-4d58-8f8e-408f9cf37fac.filesusr.com/ugd/64d889_9865be8d87774bbabc5484ef6d3fe1da.pdf?index=trueIn PDF document text
    • http://xologikaju.atwebpages.com/2746951826.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_off0000f3a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A0 5604 bytes
SHA-256: e3da1c4fcc52c80338a5e95eb648e462c561a591100d6dcacc5b8e752eeef3d0
font_01_sfnt_off000106cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106CF 11272 bytes
SHA-256: e7bc398f53068af81aa1ac47529c7bb1f88a6e29a8166cc1c21e55b5bc63dc23

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