Malicious PDF — malware analysis report

Static analysis result for SHA-256 76f202c15ebc19a1…

MALICIOUS

PDF

76.4 KB Created: 2020-12-27 21:20:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 64002a21d1a8826356c56d1fd4af869b SHA-1: 5777e6cafd8a3076df6688ac28eeb0505d09eec6 SHA-256: 76f202c15ebc19a142e55c80ac52d3d4e974804f21a8f07290d4e8b897aa59c8
234 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The 'SE_PAYMENT_REDIRECT_LURE' heuristic indicates the document may be attempting to trick users into believing there are new payment instructions, a common tactic in business email compromise attacks. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the exploitation of PDF vulnerabilities to execute a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffset.ru/wb?keyword=freebies%20for%20nurses%20today PDF link annotation
    • https://fiwatinizajof.weebly.com/uploads/1/3/0/8/130874156/b35e536550c.pdfIn PDF document text
    • https://cdn.sqhk.co/wefopijupe/dicqhb0/one_gold_bar_value.pdfIn PDF document text
    • https://zepodafato.weebly.com/uploads/1/3/4/8/134880008/694dbd7a851a.pdfIn PDF document text
    • https://kidunaxu.weebly.com/uploads/1/3/1/4/131437100/9305f6.pdfIn PDF document text
    • https://rakositove.weebly.com/uploads/1/3/4/5/134595637/rekupumuzuponefifa.pdfIn PDF document text
    • https://cdn.sqhk.co/tokititagiwe/giiahbp/52420491667.pdfIn PDF document text
    • https://gosedizomomusuw.weebly.com/uploads/1/3/4/3/134313056/kiliganap_rajigadevajop_pewowosakekebi.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/zusevamasor/gangstar_apk_download.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/34315237365.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cf9290b-c605-4377-bd5e-5d711b7a293b/bizopepafazosu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64384fb7-87a0-44dc-be05-ed99c0b87dce/46594163451.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04e63752-84aa-4359-93ab-3c3de10b210c/curso_de_inyeccion_de_plastico.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_off0000ede2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE2 5064 bytes
SHA-256: bfd7a968532221e6ada2a53739a34743b98b55e0b03362f9e7b5c56ecba81e03
font_01_sfnt_off0000ff2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2E 11228 bytes
SHA-256: e9b080ae38c34fda1c28bb13f72763ec0826b1184e76032eff8cf10252569b8b

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