Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd697d6f63dd0f76…

MALICIOUS

PDF

70.5 KB Created: 2020-11-20 03:10:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 21ecf10cc55aaeb982c8dcb1ecf16105 SHA-1: b37c2aa0a956aa05587c5048d5d55b24554f827c SHA-256: fd697d6f63dd0f76afda7148bdcd28dfb03605b852ff457d736830fc5b7df31c
156 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. One of these links, https://trafffe.ru/123?utm_term=noise+isolating+vs+noise+cancelling+airplane, is flagged as unknown reputation, suggesting a potential phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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=noise+isolating+vs+noise+cancelling+airplane PDF link annotation
    • https://bolewotimeri.weebly.com/uploads/1/3/4/6/134689798/f1b2ae.pdfIn PDF document text
    • https://xetasigebe.weebly.com/uploads/1/3/4/4/134443645/61c40914f768.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/widofafane/69454639771.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd2e6c12-bdb3-40e2-9829-fa3b5b6434f0/11398129279.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/11238867304.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/39022866745.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/91752526698.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ffa1384-a00a-4f94-bd33-ce268e37d6e5/menkaura_and_queen.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/im_a_child_of_god_yes_i_am_piano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13decb06-7838-42df-b94d-5173742454a6/43409508283.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/bengkulu_selatan_dalam_angka_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/318b693a-bf43-43a7-9827-00101ce64fcf/jozegituma.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/2001_porsche_boxster_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/ieee_829_test_summary_report_template.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_off0000d844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD844 5132 bytes
SHA-256: 9ae5ef100e206ac0350fa5eecdd68e5bdb67eedc9fad1bdfefb9e4f2d6da5291
font_01_sfnt_off0000e9dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DC 10500 bytes
SHA-256: aa2ac48eb45147ada45ee73fe7be42556c6ca650adf2b8736a48827d13941760

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