Malicious PDF — malware analysis report

Static analysis result for SHA-256 920df892619ad3bc…

MALICIOUS

PDF

73.4 KB Created: 2021-03-01 02:20:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 7f58ff90da0a08c3f93fbff1e22f8c09 SHA-1: 0fa7d42ab958d4410aba055efcce77a44e9fea74 SHA-256: 920df892619ad3bc28d5821c195097e99fde74a27dac4fcd852e85e24cef56b6
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains heuristics indicating it is a payment redirection lure, designed to trick users into clicking external links. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the presence of embedded URLs and the nature of the lure point towards an attempt to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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.
  • 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://maypoin.ru/strik?utm_term=corporate+identity+%2526+corporate+design+4.0+das+kompendium+pdf PDF link annotation
    • http://creditreportusa.info/xesonotebudixetujotinalomra0ov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373985/normal_5fe78e58c305d.pdfIn PDF document text
    • http://korecos.ru/85772234605fo2j3.pdfIn PDF document text
    • http://wubufusimeveve.22web.org/61352907486.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446162/normal_5fd2d2250bc93.pdfIn PDF document text
    • http://paksorond.xyz/samsung_q7_series_65_inchf7qgt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366000/normal_603c06975c171.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461761/normal_603c2d9c269f0.pdfIn PDF document text
    • http://legko.travel/what_size_tires_are_on_a_2014_chevy_traversemh726.pdfIn PDF document text
    • http://xuvaxujogilo.mygamesonline.org/63375819234.pdfIn PDF document text
    • http://vevolim.iblogger.org/sixavivesetiw.pdfIn PDF document text
    • http://de-bewertung-id-q2e5t23.top/blood_bowl_2_starting_chaos_teamn06mn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393359/normal_601f6dbf56187.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://musowafotoxipid.epizy.com/django_render_jinja2_template.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_off0000e5a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A3 4752 bytes
SHA-256: bfae5253ea93ca73f6475089c860e79ccdbd3ff2e966b66c8328fd2797ceea33
font_01_sfnt_off0000f5dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DC 10196 bytes
SHA-256: 4c8869f902c05cec7fa075995f7b48ccac5b839af5c2b76e0e02f5d946b1453e

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