Malicious PDF — malware analysis report

Static analysis result for SHA-256 71ebafa098f15175…

MALICIOUS

PDF

80.8 KB Created: 2021-03-01 22:16:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 0b0ea53c9fb83c8b502f7dd1cc8f3b78 SHA-1: c7e5b3856a4a2953e3714f650064de1264362153 SHA-256: 71ebafa098f15175f2b9308f64d6d5907bacf6b9c07d54a11428b1e9a113a550
134 Risk Score

Malware Insights

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

The PDF contains embedded URLs and heuristics indicate it functions as a link farm, with one URL specifically pointing to a potential phishing or malware distribution site. The 'SE_INVOICE_LURE' heuristic suggests a deceptive intent, likely to trick users into clicking the malicious links. ClamAV detection confirms the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://seumenha.ru/award?keyword=primary+purpose+of+recording+a+deed PDF link annotation
    • http://mumolazesinidix.getenjoyment.net/char-broil_patio_bistro_electric_grill_with_tru-infrared_cooking_system.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467036/normal_601a18cc9d2d2.pdfIn PDF document text
    • https://seremojalunukeb.weebly.com/uploads/1/3/5/3/135393353/eec42a12704a3.pdfIn PDF document text
    • https://janososa.weebly.com/uploads/1/3/5/3/135326085/ruvenabakifuwunozow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465709/normal_5fcc5381a7114.pdfIn PDF document text
    • http://jekiroxawuto.iblogger.org/cute_calendar_template_september_2018.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444369/normal_5fef86cfe3da5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392873/normal_5fccf580bcd82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503767/normal_602c95f3049e1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pidivatepijalaw.epizy.com/5400739355.pdfIn PDF document text
    • http://fimokixavojakuf.epizy.com/ralisuwixorozozabarenise.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/apc_back_ups_xs_1500_replacement_battery_rbc33.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_off0000ffcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCD 5548 bytes
SHA-256: 8da41cdba2c03747a7b4d9c21c7eb725b8f95cfadc7c5b3b9d351c9d881c6c46
font_01_sfnt_off0001129f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1129F 10428 bytes
SHA-256: aa56c7d283e9f480e9fc55ba73de3881735b9b07e5d56fc41999a1f7397b58c0

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