Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e9ad1e489752d10…

MALICIOUS

PDF

125.7 KB Created: 2021-01-06 15:10:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 7a17486e32c49c2af3c85bc880623aee SHA-1: 8272e7d03dbd870ca3f0163fb20414e6e3c179eb SHA-256: 9e9ad1e489752d10d5016b7b3886fd4ebff1294b7967caa5f49e6339da6b9515
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a phishing or SEO manipulation tactic. ClamAV and ML classifiers also flagged this file as malicious, specifically as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious intent to redirect users to potentially harmful sites.

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://trafftec.ru/aws?utm_term=metformin+ampk+mechanism PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4375352/normal_5ff4f168535cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374178/normal_5f95124875d61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444117/normal_5fafbfb5d52e5.pdfIn PDF document text
    • https://rivisoni.weebly.com/uploads/1/3/0/7/130739016/67fcb37b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375070/normal_5f892549ba3e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415745/normal_5fad345f11250.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417527/normal_5fab9ee8b1cab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377935/normal_5f93a22d114c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418987/normal_5fd26c27651e1.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/f415b7aa-19e6-4a6f-9b4f-368560d734a0/gunipepojitixukinezizoni.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/22112589926.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/waterbury_connecticut_land_records.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_off0001af52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AF52 5292 bytes
SHA-256: 78240ba83d6f3b2f741297391fef46941ba64c9ecfe1d9abe78815a6145246fd
font_01_sfnt_off0001c133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C133 11776 bytes
SHA-256: f7776f0dbddb82de0f46738796d8f61343a447663c9658c3b246a51ed64bdff2

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