Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b651624f8c0958d…

MALICIOUS

PDF

84.0 KB Created: 2021-05-12 00:13:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c46c473d6f13d896fa71c5c9d884220b SHA-1: 3d97920ca7de894bf22ed026c4e067cb84ecf62d SHA-256: 8b651624f8c0958dc486f368026247ffd5ff4ea3f66dc1b5a34dcb466b7c2f98
172 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a phishing lure related to driving license renewal, and it embeds multiple external links. One of these links, 'https://crophysi.ru/strik?utm_term=sc+driving+license+renewal+cost', is flagged as a potential phishing or scam destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 7

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://crophysi.ru/strik?utm_term=sc+driving+license+renewal+cost
    • https://cdn-cms.f-static.net/uploads/4480173/normal_600fb23a144a3.pdf
    • https://ralirepiputup.weebly.com/uploads/1/3/4/8/134852471/gipazel-lufazurokobow-verid.pdf
    • https://wajotirege.weebly.com/uploads/1/3/5/3/135306859/baa4f0bb48c.pdf
    • https://static.s123-cdn-static.com/uploads/4379974/normal_5fc80efe2f85b.pdf
    • http://mamafiposorugul.sportsontheweb.net/guxamememiturorek.pdf
    • https://cdn-cms.f-static.net/uploads/4389585/normal_603d24d855926.pdf
    • https://cdn-cms.f-static.net/uploads/4408170/normal_602597b769bd6.pdf
    • https://fewibiwovenekip.weebly.com/uploads/1/3/5/3/135327418/gifan_xirunowavili_jazekedi_megajitatan.pdf
    • https://cdn-cms.f-static.net/uploads/4460677/normal_605be20cc84a8.pdf
    • http://nilutafejo.mypressonline.com/faxedu.pdf
    • http://fadulifakibul.medianewsonline.com/selenium_tutorial_python.pdf
    • https://vixozomaregug.weebly.com/uploads/1/3/1/3/131398278/dubatokodelufukivedu.pdf
    • https://cdn-cms.f-static.net/uploads/4495241/normal_6011d86d1ac1b.pdf
    • https://cdn-cms.f-static.net/uploads/4464995/normal_60127fb2f1b1a.pdf
    • https://cdn-cms.f-static.net/uploads/4421048/normal_5fd09f0e28510.pdf
    • https://cdn-cms.f-static.net/uploads/4477630/normal_606d62e80b295.pdf
    • http://xelamoxadavas.mywebcommunity.org/brothers_karamazov_avsey.pdf
    • https://xonutupusuvulin.weebly.com/uploads/1/3/1/8/131871786/5fc664f4161.pdf
    • https://cdn-cms.f-static.net/uploads/4425507/normal_60435bdbd5e44.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://52b03d57-94e3-497b-b2ee-5a576b8f136c.filesusr.com/ugd/67ae49_b2165c2702a146389c8c304f9a80ea2c.pdf?index=true
    • http://gupatevefojip.myartsonline.com/parolitujub.pdf
    • http://roxujewov.myartsonline.com/81373710192.pdf
    • https://584abdf6-e408-48d3-a53c-4313a8f82471.filesusr.com/ugd/18ee90_c237ef736e4d43e0a9ca8ec8661fa9cd.pdf?index=true
    • https://9db8f275-5044-409a-aa1b-3306d9dda9bd.filesusr.com/ugd/361f4b_36b199804de147b3af2b195c8a82e8c4.pdf?index=true
    • https://6d4a8fb0-9a8a-4850-8aa1-2b5706121c9a.filesusr.com/ugd/ff2e72_9b04e74d31bc404ca8a9df3ce2a7e195.pdf?index=true
    • http://gudukiderunusu.myartsonline.com/astm_a182_15.pdf
    • https://22e365c6-0853-42e1-82f8-83473bf9c0bf.filesusr.com/ugd/217d68_cca2c392c1634173973678d9b3c2082d.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f62b.bin
ee32aa5d6fc5f6ebc848f82ec176f0f45da44ff8903ab371df5916673a482252
pdf-font-stream PDF embedded font (sfnt) at offset 0xF62B 5360 bytes
font_01_sfnt_off00010888.bin
6450163498a85f69cd3d441c8e0b52e64f242b252000812403ceded6cf06a25c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10888 10524 bytes
font_02_sfnt_off00012cb6.bin
c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CB6 16204 bytes