Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa208e9eb27fd881…

MALICIOUS

PDF

72.0 KB Created: 2020-11-29 17:36:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: fd3f49677e75472a2b1a2f467602dd02 SHA-1: 51266a3d18658cc4c9ddd02b86c79707da9de8df SHA-256: fa208e9eb27fd88120f1d992e85cffe7237d48f1f6f8908ea6acdc8740910add
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with the primary suspicious URL being trafffe.ru. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic suggest the document's purpose is to redirect users to a network of sites, likely for malicious purposes.

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://trafffe.ru/123?utm_term=gladiator+ffxiv+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371267/normal_5f8ae922b415b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460677/normal_5fa95d35c277c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382639/normal_5f9d0779b15db.pdfIn PDF document text
    • https://gokixojegesefa.weebly.com/uploads/1/3/4/8/134864476/giwaxufine-sexetugozujem-wobebijabedova.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377656/normal_5fa4fb773c6c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386365/normal_5f9056ea31d5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403954/normal_5fad44fc2ba94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469827/normal_5fa7c0fe3b6d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390055/normal_5f8f87865715e.pdfIn PDF document text
    • https://tadonajates.weebly.com/uploads/1/3/4/3/134319020/xixemos.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://uploads.strikinglycdn.com/files/f15b30f6-9244-4f34-946e-11641eb3ba10/glencoe_geometry_chapter_8_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3066640e-dd04-43f3-aa9d-5e971ac14aa0/95387529738.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/459e37fc-923b-4746-92cf-d1d30ed7c462/zadumizag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a28893ff-7207-4b7a-88b6-5bbe893bcd4d/61422223614.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_off0000cfa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA5 4832 bytes
SHA-256: f1043c2b8f7e8b0c4b5b594dbd9dce6140dcb3a1fe7ea24b7dc406edc3926623
font_01_sfnt_off0000e03a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03A 10912 bytes
SHA-256: 5afd6d00005b76cdcc8a788fd40daa17615d0a8967dc8c78c77dbf5b4bd09e9b
font_02_sfnt_off00010559.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10559 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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