Malicious PDF — malware analysis report

Static analysis result for SHA-256 f73f840a46b69e67…

MALICIOUS

PDF

69.3 KB Created: 2021-02-26 04:52:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 9fa4e29823c327ec937acee7c15cac85 SHA-1: 20262dd6739e2bd977af388ec34835cd3b8a4c2d SHA-256: f73f840a46b69e67e6de6b4e92b4c4bad96aba5424d050576483dfad88033bdd
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/123?utm_term=how+to+be+perfectly+unhappy+pdf'. This indicates the document is designed to lure users to a potentially malicious website. The ML classifier and ClamAV detection further support its malicious nature, classifying it as a phishing or trojan variant.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://yafferge.ru/123?utm_term=how+to+be+perfectly+unhappy+pdf In PDF document text
    • https://cdn.sqhk.co/jodariwem/pFDjgmQ/pencilmation_coloring_book_free_games.pdfIn PDF document text
    • http://fb-pageunderreview.com/934605054782kggc.pdfIn PDF document text
    • https://cdn.sqhk.co/tuparesoxaj/esWgdLb/archery_shooters_association_rules.pdfIn PDF document text
    • http://iclod.tech/728309049871d5jc.pdfIn PDF document text
    • http://liolika-rsya.ru/2013_honda_civic_si_maintenance_manualc5viy.pdfIn PDF document text
    • http://parralax.net/commedia_dellarte_scenariose5orp.pdfIn PDF document text
    • https://cdn.sqhk.co/noxuluni/ihsXhds/equalizer_definition_synonyms_and_antonyms_of_laconic.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/wotodedaruzuk/zogopodaves.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/42379067534.pdfIn PDF document text
    • http://mifumupesa.rf.gd/67086474713.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/fiberglass_insulation_sheets.pdfIn PDF document text
    • http://bopebewi.epizy.com/33078467999.pdfIn PDF document text
    • http://tirujukixiw.epizy.com/22492199031.pdfIn PDF document text
    • http://rivebop.epizy.com/chitrangada_bengali_full_movie_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/49273887015.pdfIn PDF document text
    • http://wuriwafu.epizy.com/application_governance_model_template.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/85009757702.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_off0000cfb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFB4 5360 bytes
SHA-256: ddd6445994c08b12d1f5ae338e8283fb4aa3701b920d1dfe28977430d0780c33
font_01_sfnt_off0000e1fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FA 10708 bytes
SHA-256: 7e4c21d79198439443d74e926f214ad63a89b7f346d596f06b74eae080d532c8

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