Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce4b568f03432860…

MALICIOUS

PDF

145.5 KB Created: 2021-01-08 04:20:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 0a07fc04f9de6b6aa5b54f9145cd06a7 SHA-1: 1e9925b15b2a896ae5e97154186824947015528b SHA-256: ce4b568f034328603ebbbd3b23ed8d4cff64ce461a6564090e3d8dc16ad2ca37
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The ML classifier and ClamAV also flagged this PDF as malicious, specifically as a phishing trojan. The embedded URL 'https://traffine.ru/123?utm_term=the+trials+of+apollo+the+dark+prophecy+read+online' suggests a lure to a fake content page, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://traffine.ru/123?utm_term=the+trials+of+apollo+the+dark+prophecy+read+online PDF link annotation
    • https://cdn.sqhk.co/tojebaru/ZjdjgrE/73452290608.pdfIn PDF document text
    • https://cdn.sqhk.co/rawerusiwala/gcicxgd/dino_safari_2_hack_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/gawukale/hcjbicm/lasafugit.pdfIn PDF document text
    • https://cdn.sqhk.co/wumigapinido/hj7jhcs/crayola_scribble_scrubbie_pets_mega_pack_animal.pdfIn PDF document text
    • https://cdn.sqhk.co/wozepefiga/kjaJjfb/metrozone_fortune_cookie.pdfIn PDF document text
    • https://rubovumalez.weebly.com/uploads/1/3/4/4/134458479/5835206.pdfIn PDF document text
    • https://cdn.sqhk.co/rosavuzezig/iShehjV/iowa_80_truck_stop_barber_shop.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/wilugugo/99387789292.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/aia_life_insurance_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/15488824965.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/getokugowavimefulakinawu.pdfIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/brunner_and_suddarth_13th_edition_ebook.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_off00020273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20273 5356 bytes
SHA-256: 21d9f3c7c2b5d40b98105fd1aa1feb0bfc961a4e0d75c8bdac2c4acf4b02f3f3
font_01_sfnt_off000214af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x214AF 10792 bytes
SHA-256: 5b0b9866cba3c6c4cf20db241880ff30e5375892f2f47b4e54422bfd5a4c7569

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