Malicious PDF — malware analysis report

Static analysis result for SHA-256 de7ff44c398b9ecb…

MALICIOUS

PDF

69.9 KB Created: 2020-11-24 08:00:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: dbbcfdf58a695dc557561c4505804787 SHA-1: daa7ce125157cc5eb7a001ed87bd2354de98b0b6 SHA-256: de7ff44c398b9ecb22837ba1499db2dd21bbf41f0364bfdf914c7c572b789a05
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a PDF link farm, pointing to various domains including 'traffnew.ru' and multiple 'weebly.com' subdomains. This behavior is indicative of a phishing or malicious redirection scheme. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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=the+birds+du+maurier PDF link annotation
    • https://pofemazavuson.weebly.com/uploads/1/3/2/3/132303373/3762798.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417037/normal_5f9db4248be7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416798/normal_5f95f96760e27.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/0c1d659763.pdfIn PDF document text
    • https://polirafula.weebly.com/uploads/1/3/4/5/134528493/1acf8c7a4b63c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367648/normal_5f875adceb25d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472773/normal_5fa8f95c961dd.pdfIn PDF document text
    • https://jomigotub.weebly.com/uploads/1/3/4/7/134748998/9118085.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412396/normal_5fb428021ee35.pdfIn PDF document text
    • https://rijumiwotoresu.weebly.com/uploads/1/3/4/4/134490354/388136.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408190/normal_5fb25af546a46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382770/normal_5f8ef90adae07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366331/normal_5fabe1eda3ed3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f672b41a-ea25-4963-be64-99a5002ea4a3/71987340972.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1eef691c-f734-4e94-a8ab-64a856a5a366/long_eared_squirrel.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_off0000d60d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD60D 5120 bytes
SHA-256: e3be9a0c6df41bb2c843bfc1b1f0ff009fcf34bc9c95074000e4d83595969e23
font_01_sfnt_off0000e73d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE73D 10492 bytes
SHA-256: e9a8575d5e3ad4e8c4ae5d2bc84bc93f049d22d4ccb29ef250133b6fbd0c6c96

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