Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4237afcd81e39f4…

MALICIOUS

PDF

70.7 KB Created: 2021-01-15 00:12:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8bd744cb8d7e7882c8ecadb08ed4889e SHA-1: 7ece3c2f9bcbdeaff95da5c8f0afbcb6b9f02781 SHA-256: f4237afcd81e39f4840d1a7405274501b7ec4e593cc9d2882bfe1807ddd6b667
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URL pointing to 'traffnew.ru', which is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to 'guitar sheet music'.

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
  • 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://traffnew.ru/aws?utm_term=la+campanella+guitar+sheet+music
    • https://site-1171591.mozfiles.com/files/1171591/nageganeribivakovagot.pdf
    • https://site-1172418.mozfiles.com/files/1172418/crazy_superhero_car_stunts_hot_wheels_car_games.pdf
    • https://static.s123-cdn-static.com/uploads/4426271/normal_5fc619d015a5f.pdf
    • https://site-1194964.mozfiles.com/files/1194964/nuts_bolts_recipe_healthy.pdf
    • https://site-1176800.mozfiles.com/files/1176800/durexelunoguzenitipezobuw.pdf
    • https://static.s123-cdn-static.com/uploads/4374860/normal_5fee4e3fe8057.pdf
    • https://cdn-cms.f-static.net/uploads/4375071/normal_5fbf50da44f2d.pdf
    • https://site-1178770.mozfiles.com/files/1178770/98249671894.pdf
    • https://site-1192097.mozfiles.com/files/1192097/95952115497.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wazagidonux/calidad_ambiental_en_colombia.pdf
    • https://s3.amazonaws.com/divelatoxa/voucher_formativi_master_regione_toscana.pdf
    • https://s3.amazonaws.com/mubemutolewe/80565540881.pdf
    • https://s3.amazonaws.com/tizowodifi/zadejukotelajefi.pdf
    • https://s3.amazonaws.com/pukasojalu/75272294034.pdf
    • https://s3.amazonaws.com/loxopudizus/91674771907.pdf
    • https://s3.amazonaws.com/wazorixekunafob/apfelkuchen_saftig_springform_thermomix.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf5b.bin
cde6c1980529779c14c63353c343de9ae47609c51341b412c7675f7e56470e3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF5B 5288 bytes
font_01_sfnt_off0000e12c.bin
56343c2e7ab961b82a677665008270bb940d260c8095d13bc8c6b2f1f18280cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE12C 17292 bytes

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