Malicious PDF — malware analysis report

Static analysis result for SHA-256 25c4f9c74948ef37…

MALICIOUS

PDF

73.4 KB Created: 2020-12-21 01:09:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 35460c1c9bddf9b589252f9a8f2c841c SHA-1: 1c2e79e8687db6077d8fc0c58e39d56114fcd818 SHA-256: 25c4f9c74948ef37abae5f892cf96c0f458b541c5ce4020c520c6ca92e711d0b
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector and a link farm. One of the primary URLs, 'https://ggtraff.ru/strik?utm_term=copper+prices+per+pound+in+tennessee', is flagged as a malicious redirector. The ML classifier and ClamAV also strongly indicate maliciousness, consistent with phishing or scamming activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/strik?utm_term=copper+prices+per+pound+in+tennessee In PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/8276696.pdfIn PDF document text
    • https://voxonevixes.weebly.com/uploads/1/3/4/3/134383310/9607b6.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/xoguwavosuje/36827948105.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/54194947187.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc7d42ec98190d8a5337c0/t/5fdd0f1a0377c830fcb78f70/1608322843283/popobupesegugexakusofe.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/babu_parsuram_odia_movie_song.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/zenugexonakemesobep.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/lalusomuro.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/any_force_form_available_now.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a1848fc-591e-4e0b-8f09-770bfaaf30ed/far_from_home_the_adventures_of_yellow_dog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95237756-3c5d-4f82-8f30-daaf829c0ea5/lawubesadegokasagosawise.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/vevuzizemex.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/sentence_sequencing_worksheets_2nd_grade.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc29729405d5340f33472fa/t/5fc4e9b4f3de5e49b5ff7464/1606740404699/anti_paladin_prestige_class_pathfinder.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/firawurusodalutevov.pdfIn PDF document text
    • https://s3.amazonaws.com/dofufiri/my_boy_emulator_apkpure.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_off0000d950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD950 4732 bytes
SHA-256: 71b1dace01110cd0bd65cdc5102f6085a556666de16ec72b32c31aeeeb277782
font_01_sfnt_off0000e968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE968 2012 bytes
SHA-256: 6d89c54bfef412d02a439fa103b09c01255bf205ae670ca771b2ac50906b3e4d
font_02_sfnt_off0000f2c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C8 11004 bytes
SHA-256: cf3c6684dde1558f29b8529b019f5e8c7d953c7742576d64cf4fad2a02700d0a

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