Malicious PDF — malware analysis report

Static analysis result for SHA-256 d13864c4fb477b64…

MALICIOUS

PDF

71.8 KB Created: 2020-12-17 16:40:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 0cb72e74a19b5746fd56e16dfdaecd63 SHA-1: be95eb3235962545c46e0c94ba34831b670b73db SHA-256: d13864c4fb477b647af43eb355f3458bb513595b13c53347dfcff75986a46b32
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that leads to a suspicious domain, likely intended to host a malicious payload or phishing page. The document body, though heavily obfuscated, contains keywords related to housing developments, suggesting a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffnew.ru/strik?utm_term=housing+developments+in+trinidad+and+tobago PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367916/normal_5fd1c948756f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466165/normal_5fb8787b81a0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393901/normal_5f9608a54d8d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413697/normal_5fc35e9aefa5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461748/normal_5fa9432a949c3.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/tinajabizoreguf/catabolism_of_amino_acids.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/american_assassin_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/duvinuja.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/kannada_nursery_rhymes_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/didilazaza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc65af20-57bc-42f2-8c1e-5c9ef6e02fb3/91306746856.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/soxifovoxak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/995a565c-a2b4-45eb-9d0e-34144db498eb/pinewood_computer_core_meltdown_music.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_off0000dbf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF8 5440 bytes
SHA-256: b3eca5d1824c2d01711579c06cb2fc69cf81e451f05469a804c800c685263940
font_01_sfnt_off0000ee59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE59 10628 bytes
SHA-256: 2e8eb0bbcd72e62f0146a246b3f32f644b1eadc4d042eac6ca07cc23c659b449