Malicious PDF — malware analysis report

Static analysis result for SHA-256 47470f2062df9623…

MALICIOUS

PDF

70.8 KB Created: 2021-02-28 00:03:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 203bc18cb6fe555779344201076e5703 SHA-1: 409e3e20b22a2a89ca8bc82fda0377afa3a57ce2 SHA-256: 47470f2062df9623615e4847de5ca79bcbffa57b414c328ef903728e92dbf6a2
134 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is a link farm and a phishing lure, specifically mentioning invoice or payment language. The primary IOC is a URL that appears to be the destination for the lure. While no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly suggest malicious intent, likely involving the embedded URL to download a secondary payload.

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 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://mezovuduw.ru/strik?utm_term=doors+to+darkness PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490377/normal_6019b94061a09.pdfIn PDF document text
    • http://pefiworawodud.mypressonline.com/govonafejanideg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446499/normal_600770ebe4306.pdfIn PDF document text
    • http://tidedejix.iblogger.org/que_es_un_acido_graso.pdfIn PDF document text
    • http://shoop-fl.ru/minecraft_java_edition_cheapqw5jz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417413/normal_5fcb4ac67f52f.pdfIn PDF document text
    • http://igrarazuma.info/reporting_anova_results_apanqtaq.pdfIn PDF document text
    • http://feretezijuna.22web.org/before_the_throne_of_god_above_sovereign_grace_music.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/92202359153.pdfIn PDF document text
    • http://sakunesazodi.epizy.com/bepegi.pdfIn PDF document text
    • http://vakisetituli.rf.gd/bandura_1977_self_efficacy.pdfIn PDF document text
    • http://zolivowubek.epizy.com/system_center_orchestrator_installation_guide.pdfIn PDF document text
    • http://zofotozagozuw.rf.gd/65001913191.pdfIn PDF document text
    • http://tuzipani.rf.gd/kaxewiveb.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/xuxasowidunozopod.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/happy_birthday_piano_solo.pdfIn PDF document text
    • http://wunekoxewufomaf.epizy.com/dremel_400_xpr_kit.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/99697357804.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_off0000dae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE0 4848 bytes
SHA-256: a4fd3a11a5cb91d88b80692135dd16d26aff356db28243fd752a7018ba52d427
font_01_sfnt_off0000eb6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6F 10148 bytes
SHA-256: 1a765528ee45f64d93e566a167de2ae72554851881dde73035a781bf46fd3924

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