Malicious PDF — malware analysis report

Static analysis result for SHA-256 e04420b045d35091…

MALICIOUS

PDF

81.9 KB Created: 2021-03-30 13:18:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4bb029cdce3461a21e4c5551fdab6b31 SHA-1: 528e59aa63cf515f0bd82cc9e005ec8c97f53761 SHA-256: e04420b045d35091a4b4300f934f9f7f2bcbdaa3e2c2a1c0e1d7820d86d02945
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'seumenha.ru', which is likely used to host a phishing page or a second-stage payload. The document body is heavily obfuscated, but the presence of external URIs and the overall detection suggest a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/aws?utm_term=and+but+therefore+storytelling
    • https://cdn.sqhk.co/xiwasazafu/xJbgheo/14743757293.pdf
    • https://cdn.sqhk.co/rowofabuf/cqZifaC/60160356989.pdf
    • http://optarfes.com/transformation_chimique_ou_physique_exempleg33mt.pdf
    • http://5coupon.info/bongo_movies_2018_mp4l8cof.pdf
    • https://cdn.sqhk.co/zukasedu/jcvyRja/como_baixar_block_strike_no_pc_2019.pdf
    • https://cdn.sqhk.co/sesijisova/Pkhhgge/xuvarimere.pdf
    • https://static.s123-cdn-static.com/uploads/4443608/normal_5fcb49cbe06b2.pdf
    • https://cdn.sqhk.co/nuzifixe/jehghbA/85595694012.pdf
    • https://cdn.sqhk.co/kezagajasiw/Fhj5XDm/the_pirate_plague_of_the_dead_treasure_guide.pdf
    • https://cdn.sqhk.co/nejisakatok/cg7yvcr/34244481068.pdf
    • http://keto-s1.com/the_prince_kiera_cass_summaryllumo.pdf
    • https://cdn.sqhk.co/bamosabubesi/hdcgdih/90942117175.pdf
    • https://cdn.sqhk.co/farafakilof/jdOcgec/tle_parent_app_not_working.pdf
    • https://cdn.sqhk.co/kivipemo/CFgdiND/wobokosomapodotiw.pdf
    • http://mscredit.info/2760384577588i1p.pdf
    • https://cdn-cms.f-static.net/uploads/4379849/normal_601daf2987f19.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/fajixe/can_you_defer_corporation_tax_covid.pdf
    • https://s3.amazonaws.com/pusolefosex/amd_vega_20_performance.pdf
    • https://s3.amazonaws.com/novipaliwid/brothers_movie_video_song_bestwap.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f412.bin
511bebf570e5508f7b9cd03e9956a938b57de154af173ab3cfd571a0a3f97341
pdf-font-stream PDF embedded font (sfnt) at offset 0xF412 5072 bytes
font_01_sfnt_off00010553.bin
e68c914dcc10d7deea3f4038f25bb9016b1d912755a2a6a83262cee97be9aae2
pdf-font-stream PDF embedded font (sfnt) at offset 0x10553 10876 bytes
font_02_sfnt_off00012a94.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A94 4324 bytes