Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f492439c22fef4a…

MALICIOUS

PDF

61.8 KB Created: 2020-11-21 23:25:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 2b2670276a641aa8c877e03d64ae8c77 SHA-1: 1feaacd1d9162cca5c74152161a5b6f6cb367ab2 SHA-256: 1f492439c22fef4a8d42f28a285a5c7a8e815c85b4881d215d14626a8aea59b2
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that leads to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=fallout+4+sim+settlements+upgrade+scrap PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384832/normal_5f9892c126a1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365575/normal_5f8c18f9a32a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445871/normal_5fa7c9f48149e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419818/normal_5f9c8550995d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446275/normal_5faa795dc7bf1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369782/normal_5f87e58c65d9a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/daily_english_news_paper_download.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/magizus.pdfIn PDF document text
    • https://s3.amazonaws.com/golepe/lasalle_council_bsa.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/treino_assertivo.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/red_bird_restaurant_maryland.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/62816997858.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aa3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA3D 5316 bytes
SHA-256: ab3a1f8622eae66809346f3f695f0a4f3ecbb12ef75a2ad6f019742cdbbdff80
font_01_sfnt_off0000bc3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC3B 9252 bytes
SHA-256: 5e8dea8938ecb0df34594fa877794e5edc408cde3ae3f85939e1f5685e2e2a6e
font_02_sfnt_off0000dbd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD2 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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