Malicious PDF — malware analysis report

Static analysis result for SHA-256 b107efa7696fe856…

MALICIOUS

PDF

68.1 KB Created: 2021-03-01 03:02:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a82a8ac1197721d88f75e624681e420b SHA-1: 2e29f8c4781de1ed3635e9333a30222d431efb53 SHA-256: b107efa7696fe8564f864ad01f8f2f3673034ad6150d557fbf291cfd60a02955
124 Risk Score

Malware Insights

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

The sample is a PDF file identified as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, with one specifically pointing to 'xezojetit.ru/award', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains keywords related to science activities, likely serving as a lure. No scripts were extracted, but the PDF structure and embedded URIs indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8239

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://xezojetit.ru/award?keyword=a+color+of+his+own+science+activities PDF link annotation
    • http://tonerinkstore.com/detobagawibubol4v2qs.pdfIn PDF document text
    • http://espacecmb.xyz/seinfeld_tippy_tippy_day_daybd4fu.pdfIn PDF document text
    • http://klossheff.xyz/android_translate_animation_using_objectanimatorqz8v3.pdfIn PDF document text
    • http://kfcrabota.ru/hypothesis_testing_example_questions_and_answerset7sp.pdfIn PDF document text
    • http://banquepopulaire-fr.org/star_traders_frontiers_best_ship_upgradesq2sk1.pdfIn PDF document text
    • http://shoop-fh.ru/327661064423uf1e.pdfIn PDF document text
    • https://cdn.sqhk.co/gikunixa/gigfDF9/moto_g6_camera_app.pdfIn PDF document text
    • http://telgrm.site/4291770280988p26.pdfIn PDF document text
    • http://khanapoorti.com/mcdougal_littell_geometry_textbook_answer_keywgyem.pdfIn PDF document text
    • http://pek-24.cc/potter_and_perry_fundamentals_of_nursing_9th_edition_study_guideceas9.pdfIn PDF document text
    • https://lemuvizavo.weebly.com/uploads/1/3/2/6/132682731/e67ab6f619f30.pdfIn PDF document text
    • http://souve.me/wumudaliwupazesufulumusoy4tq6.pdfIn PDF document text
    • http://raifaisentapp.online/nibomijunepuxexivadirhjlev.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/galinikagopit/ost_abyss_stay.pdfIn PDF document text
    • https://s3.amazonaws.com/zatasipezeg/surirusuwirakibasesop.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/catharanthus_roseus_propiedades_medicinales.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2BF 5108 bytes
SHA-256: b2403ed97d5e5dfc5095c7ea2007e07d460f7f0d51f025281679d810579a0a07