Malicious PDF — malware analysis report

Static analysis result for SHA-256 8980d10c42237163…

MALICIOUS

PDF

65.2 KB Created: 2020-11-09 19:46:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 7b82c0ebaa10736722eb32b2c0b601d9 SHA-1: d1073205243c83d83207eec229695ba40a01d646 SHA-256: 8980d10c422371633b6dbec32652eeeccc77e33a73e3c88eecc9b1b83fc3bd20
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of numerous external URLs, including one pointing to 'trafffi.ru', suggests the document is designed to redirect users to potentially malicious sites or to manipulate search engine rankings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/aws?keyword=advanced+armor+flexibility+kit+conan+exiles PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4425913/normal_5f9e548ed3991.pdfIn PDF document text
    • https://movidotibapokab.weebly.com/uploads/1/3/4/2/134265591/xafebe.pdfIn PDF document text
    • https://balejumefem.weebly.com/uploads/1/3/0/8/130814467/6427063.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/cours_d_anthropologie_sociale_et_culturelle.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/google_support_case_id.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/811f130b-e5cf-4d8b-8347-c616fde8f562/kabekuf.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/ping_tom_memorial_park_boathouse.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/61757767331.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b9271a9-70d8-4467-a5b6-eaa74c28b7b6/selenium_chromedriver_2._35.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/wubowazudo.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_off0000c128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC128 5588 bytes
SHA-256: 967e9bbef3c181eb6fd7ac030f1bf41e8037d0b8c69ffe0d291ace31dcd34991
font_01_sfnt_off0000d429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD429 10560 bytes
SHA-256: 2a5954748841d9ffbea5cc24df7331ba372c7bfb3373818dc1ad04ff7dab85e4

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