Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf3177a7ab2fa3c9…

MALICIOUS

PDF

69.6 KB Created: 2020-12-25 02:11:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 6abfdd3f781ab9ecbd489a7ba8db7194 SHA-1: bc0e9c833873620ed986c46ea6f98bfc73fa9fc0 SHA-256: bf3177a7ab2fa3c943d4aa3c327be0b4d1c963d4e35fea21b3546561d771ad61
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The heuristic firings indicate a malicious redirector and a link farm, suggesting the document's primary purpose is to lure users to external sites. While no scripts were explicitly extracted, the nature of the PDF and its embedded links strongly suggests an attempt to compromise the user through redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/123?utm_term=manual+push+mower+reviews In PDF document text
    • https://mabalavorejeg.weebly.com/uploads/1/3/4/7/134769590/rutozodexerame.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/c286fefbcc.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/jiwisi/97770316067.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/025b9554-b62b-4c14-870a-170f1e73ef1f/89848639231.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/risikaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8b40606-9bf0-4e8b-9017-2977f3469c4a/spectrum_remote_tv_codes_rc122.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/vuduk.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/16941818481.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/87241354093.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/69692336919.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_off0000d425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD425 5216 bytes
SHA-256: 64d7932d7b17bb2e0ae72e04e80302f26de3ec28f23a999a62018eabd324bd9e
font_01_sfnt_off0000e5d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D6 10632 bytes
SHA-256: 7d01d6891618e886e1bb560b6aae752f7531a210a932591fe88300c79c696266

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