Malicious PDF — malware analysis report

Static analysis result for SHA-256 dda7f092d487fd7c…

MALICIOUS

PDF

68.3 KB Created: 2020-12-20 23:44:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e621cd1d39ed8db552663e6a1d7417a1 SHA-1: ef51a7e84aefa2ff1afec8d1be253df89a48817d SHA-256: dda7f092d487fd7cacff79ab8cc2b6d6548e03e06860f0e6b65783006830338a
156 Risk Score

Malware Insights

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

The PDF contains a link farm heuristic, indicating it is designed to host numerous external links. One of these links, 'https://trafffi.ru/strik?utm_term=bad+banks+season+2+episode+6+review', is flagged as an external URI and is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafffi.ru/strik?utm_term=bad+banks+season+2+episode+6+review PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426954/normal_5fbcb0a4a4607.pdfIn PDF document text
    • https://vemewibikem.weebly.com/uploads/1/3/0/7/130776349/wuzak-fubedekifalalif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425916/normal_5fd79e1237e5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443602/normal_5fbcaa8b06d38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402718/normal_5fdbbf590f8d8.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/6b4ae084-3317-4ed4-8ab7-5a6dce243552/how_to_make_a_sphere_in_sketchup_2016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65c6d22e-1145-4f7b-9455-f68c7769fce1/batope.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/792ab5d4-7e71-4328-ac4c-ad82716547ad/dfas_form_9098.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e81379df-f09a-4d91-9e1e-20e3589d321d/fuwupepesarogum.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf1205147b14804f7ef34/1606283556191/bowilepigomaz.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_off0000cdbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDBD 5612 bytes
SHA-256: 16eab5d9dfdbc8f3f57004e61158f00c1b7b7fa6b92f3422c775b8613addb4d7
font_01_sfnt_off0000e0f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F0 10704 bytes
SHA-256: 8413509ff12101cfd424be161d7c0b4e34a2a3c233e3cccfe377dd870dc5114c

Open this report in the interactive analyzer, or submit your own file for analysis.