Malicious PDF — malware analysis report

Static analysis result for SHA-256 84eab85f5f9a4982…

MALICIOUS

PDF

78.8 KB Created: 2021-03-10 11:53:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc550dabbe496ae136001f0c05601d66 SHA-1: de8e44e8b727d7b4e14096a6be2c49d296875ec7 SHA-256: 84eab85f5f9a4982f0e064a738196092e4ec73147f1a86f8f7aa513b31dfacef
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that, when visited, likely leads to the download or execution of a malicious payload. The document body, though heavily obfuscated, suggests a lure related to free software templates.

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://nipisod.ru/123?utm_term=free+after+effects+cs3+slideshow+templates
    • https://cdn-cms.f-static.net/uploads/4383566/normal_60183aabd970c.pdf
    • https://cdn.sqhk.co/lixijadimit/jgihdIg/zombie_tower_defense_games_ios.pdf
    • https://cdn.sqhk.co/febowozefu/kQihjjS/9771406604.pdf
    • http://kolagozisil.mywebcommunity.org/96841100941.pdf
    • http://mosebuzixat.mywebcommunity.org/tikikusotixamifavagas.pdf
    • http://kebenoda.scienceontheweb.net/koxujesuju.pdf
    • http://kimokabif.medianewsonline.com/xevilevel.pdf
    • https://static.s123-cdn-static.com/uploads/4370275/normal_5ffc93b3e4333.pdf
    • https://cdn.sqhk.co/dovoxukeni/igy1lNj/mk5_tdi_auto_to_manual_swap.pdf
    • https://cdn-cms.f-static.net/uploads/4447270/normal_603a1a459e982.pdf
    • https://cdn-cms.f-static.net/uploads/4454971/normal_604887889a597.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wazagidonux/6957928109.pdf
    • https://s3.amazonaws.com/wajufifenoxuj/descargar_guia_autometrica_2017.pdf
    • http://kogotiru.myartsonline.com/public_finance_management_act_2020_kenya.pdf
    • https://s3.amazonaws.com/zemigiduwagafu/5959935691.pdf
    • https://s3.amazonaws.com/viromibukoleliw/restaurant_management_interview_questions_and_answers.pdf
    • https://s3.amazonaws.com/pogolo/inconel_718_data_sheet.pdf
    • https://s3.amazonaws.com/zagapaxa/how_to_add_comments_in_css_stylesheet.pdf
    • http://sogurorirerew.onlinewebshop.net/how_to_turn_on_nordictrack_treadmill_1750.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_off0000ed78.bin
68445f3f9324fca2606590077c65aadc8b4958deac2779dc7b323afd2ee61d7b
pdf-font-stream PDF embedded font (sfnt) at offset 0xED78 5608 bytes
font_01_sfnt_off0001006b.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
pdf-font-stream PDF embedded font (sfnt) at offset 0x1006B 1800 bytes
font_02_sfnt_off000108f8.bin
cb135c39bb8cf89185fccca0dc206eb42e2a3e2a64dc07d8bdd7f954a5c14f07
pdf-font-stream PDF embedded font (sfnt) at offset 0x108F8 10604 bytes