Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a9ff649a79956af…

MALICIOUS

PDF

80.6 KB Created: 2021-03-04 02:32:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed6c43688f9975e8a162be4d00261575 SHA-1: 788a53300f22d0c1afae6d56ec36447170fc321d SHA-256: 2a9ff649a79956af1cceaef7967e542db74a1736d8ec4f51b5c861f6ceae6f24
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an external URI pointing to a suspicious domain, and the ML classifier strongly flagged it as malicious. The document body, though heavily obfuscated, suggests a lure related to 'auto lotto processor software'. The presence of embedded URLs and the overall detection by ClamAV indicate a phishing or malware distribution attempt, likely using a spearphishing attachment vector.

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://druttle.ru/wix?keyword=auto+lotto+processor+software
    • https://cdn.sqhk.co/nixivezez/MjjPqOl/hummer_jump_starter_distributor.pdf
    • https://cdn-cms.f-static.net/uploads/4448986/normal_60274b020b260.pdf
    • https://cdn-cms.f-static.net/uploads/4406169/normal_603c1cd0f2c9f.pdf
    • https://static.s123-cdn-static.com/uploads/4485569/normal_5fcc47baab81c.pdf
    • http://busibear.com/tabela_de_conjugao_de_verbos_em_ingles9qqiz.pdf
    • https://cdn.sqhk.co/zuzikewed/hPtbzmn/63707304838.pdf
    • https://cdn-cms.f-static.net/uploads/4419832/normal_60196ab5606ea.pdf
    • http://janurikemodowu.iblogger.org/what_does_seasonally_adjusted_cpi_mean.pdf
    • https://cdn.sqhk.co/divojimo/c3g2Rns/maze_runner_reunion_2020.pdf
    • https://static.s123-cdn-static.com/uploads/4530846/normal_5fee92d4ef887.pdf
    • https://cdn.sqhk.co/bexefoboxevi/bWgwoNi/minecraft_1._7_10_morph_mod_mineturk.pdf
    • http://winnerslm.space/herbert_l_clarke_technical_studiespau4o.pdf
    • https://static.s123-cdn-static.com/uploads/4480889/normal_5feeb63bf3b31.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kasuwevovog/surface_area_of_hemisphere_worksheet.pdf
    • http://pewulalabes.epizy.com/reported_speech_exercises_online_agenda_web.pdf
    • http://fafezevasuba.rf.gd/76712740334.pdf
    • https://s3.amazonaws.com/lososimap/tazubopena.pdf
    • http://buzidasore.rf.gd/smc_flex_manual.pdf
    • http://tezajiduzut.epizy.com/public_health_act_1936.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_off0000fdae.bin
ac5d67836ebbbc1a4d95aeecb0624afe4e7e46fd560a5c3300c4e612dd306051
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAE 5092 bytes
font_01_sfnt_off00010f24.bin
ccf0909fe97c6d10c2cb44af7fe0f9b6a5b4b9439d32fc9445a8739173748699
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F24 11412 bytes