Malicious PDF — malware analysis report

Static analysis result for SHA-256 66bbfc85bd9456d4…

MALICIOUS

PDF

73.6 KB Created: 2020-12-03 21:45:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 925371f52e5a2bd67af211dc832606f8 SHA-1: 1273a0f7e7f21af29a502d4ca967a076806bd4a1 SHA-256: 66bbfc85bd9456d48acbe4c1a1af3d55b724f84edcfa33c7e1e4f7506c605ab6
222 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

This PDF document impersonates Amazon, employing urgency and payment lures to trick users into clicking malicious links. The document contains multiple links to disposable hosting domains, including a redirector URL, indicating a credential phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://finiluxexolije.weebly.com/uploads/1/3/1/8/131856594/466192.pdf.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://trafffe.ru/strik?utm_term=pagar+metro+pcs+espa%25C3%25B1ol PDF link annotation
    • https://finiluxexolije.weebly.com/uploads/1/3/1/8/131856594/466192.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485578/normal_5fc3e72aeb78e.pdfIn PDF document text
    • https://sokegipamemaxo.weebly.com/uploads/1/3/4/3/134345901/dafejukop-pubopetup-risasusidim-mapivo.pdfIn PDF document text
    • https://nuliludozaremul.weebly.com/uploads/1/3/4/8/134887499/6294297.pdfIn PDF document text
    • https://bipotanerazufis.weebly.com/uploads/1/3/4/5/134597687/xolugetuwinenuw.pdfIn PDF document text
    • https://remezimivof.weebly.com/uploads/1/3/4/5/134582621/wodamonujaluzowom.pdfIn PDF document text
    • https://jedidaril.weebly.com/uploads/1/3/4/6/134687024/578f3656f52538.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/ce02014a20d.pdfIn PDF document text
    • https://figapizezedop.weebly.com/uploads/1/3/4/3/134364787/rukabilifu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc4d73311f6a419849eeda5/t/5fc809ac234f70360a9ca776/1606945197389/70513262226.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1ac0c8787e87989717060/t/5fc3c07f3f75b1664346be10/1606664321839/dijomizewixujewofe.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc06ef3116eb00e3c49974f/t/5fc19ddb9ee0f32b87900ce1/1606524379899/nemedidakokixoroliwuxil.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfd46588c99b6d37a0e04e/t/5fc4ae543c02f22b9da11176/1606725204583/kolodetuda.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_off0000dfff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFFF 5464 bytes
SHA-256: ccf2d22ac97aa6b02373983a9d4a7699327385f66ce6c4a3127d3efe4da197a7
font_01_sfnt_off0000f240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF240 11196 bytes
SHA-256: f6601e355b94343a16f49c6cda5e165f30bedd340dcc9eee2fcf9a968b9f1335