Malicious PDF — malware analysis report

Static analysis result for SHA-256 d25a1019ec1e95ea…

MALICIOUS

PDF

71.2 KB Created: 2020-12-22 10:39:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9feb53695e768ed91d2303c97d6c87a0 SHA-1: efd96558438990d30dd877d038b5996342c0e435 SHA-256: d25a1019ec1e95eaddae77249d9f886dac722d06f489ce2f128e16fa94b415d5
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many of which are hosted on dynamic DNS services, suggesting a link farm or phishing operation. The primary URL, trafftec.ru, is likely used to host malicious content or redirect to phishing pages. No scripts were extracted, but the PDF structure and numerous external links point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=my+gba+emulator+apk PDF link annotation
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/8428ee4496849.pdfIn PDF document text
    • https://zuzedunili.weebly.com/uploads/1/3/4/4/134460484/vopipekijuwisu.pdfIn PDF document text
    • https://susemozud.weebly.com/uploads/1/3/2/8/132814624/zowiwevitasaze.pdfIn PDF document text
    • https://nazizuvadonilu.weebly.com/uploads/1/3/4/5/134590702/vamepumiwojel.pdfIn PDF document text
    • https://jakinazar.weebly.com/uploads/1/3/1/0/131070367/6446120.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/ff89b530-ec3c-4b21-a028-8f4ad9d039e4/35453602441.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ef8e652-1647-40b0-86a2-1bcd34944b10/naduzusasumokiz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fde7a645fb7d01a9b07559e/t/5fdf8a1a7514fb3b765c2e0a/1608485403484/95775461332.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e0f3f7cf8c75402ad020/t/5fc18e36e18c5c478e36a61a/1606520374503/mount_carmel_nursing_home_milwaukee.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc519b07d0c8f249d5c1082/t/5fc83833f97c193540e779bd/1606957107225/41080906942.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ed1560f2895dc1e7fe11/t/5fc561eae18c5c478eafa8c1/1606771183199/42839608245.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_off0000cafd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAFD 5000 bytes
SHA-256: a843372a29d315c7077ad2480bb05227a244c11faac99669ed968c07ac57da20
font_01_sfnt_off0000dc18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC18 11384 bytes
SHA-256: c8ac6f74fd10c3c17a63435fe49bbd754443ebd62cc71b5aa540b56031e14bd6
font_02_sfnt_off0001022c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1022C 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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