Malicious PDF — malware analysis report

Static analysis result for SHA-256 a76b772cecffa9eb…

MALICIOUS

PDF

74.1 KB Created: 2021-03-24 06:11:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c90b628f9984f5855f3d8f8de4680b16 SHA-1: 77142a8728709a02c980d96ecc90e0f4ac64e17b SHA-256: a76b772cecffa9eb536776057c42b41587e1a468fdbb71e261dd3b010ebbe061
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body is heavily obfuscated and does not provide clear textual lures, but the presence of the external URI strongly suggests a phishing or redirection attack.

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://xezojetit.ru/wix?keyword=spongebob+jellyfish+pixel+art
    • https://cdn.sqhk.co/borefigux/ifc0jeH/architecture_design_birthday_party_ideas.pdf
    • https://cdn-cms.f-static.net/uploads/4381289/normal_601fa9b4b430d.pdf
    • http://nerazegizetikam.getenjoyment.net/cahier_des_charges_informatique.pdf
    • http://xuzerujagojagip.scienceontheweb.net/capital_letters_in_cursive.pdf
    • https://cdn-cms.f-static.net/uploads/4367674/normal_5fe8865033a80.pdf
    • https://cdn.sqhk.co/fowurona/ghedV14/20989743115.pdf
    • http://rujewazaxijaza.sportsontheweb.net/bonusakamevekivosolidew.pdf
    • http://saxoxiwu.iblogger.org/functional_life_skills_checklist.pdf
    • https://static.s123-cdn-static.com/uploads/4403938/normal_5fe1054e68697.pdf
    • https://cdn.sqhk.co/somufegojaru/ghW26gf/73733667673.pdf
    • https://cdn.sqhk.co/xebibugekux/hev2jgb/stick_fight_war_stickman_battle_multiplayer.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tiniruru/attendance_app_in_android_studio.pdf
    • http://bexalaxawuwe.rf.gd/zitoraxabamasesibu.pdf
    • https://s3.amazonaws.com/xasovewipeje/how_to_use_structure_in_c_programming.pdf
    • https://s3.amazonaws.com/zemigiduwagafu/how_do_i_add_file_wix.pdf
    • https://s3.amazonaws.com/gurafoga/16275398409.pdf
    • https://s3.amazonaws.com/kodipopujufipig/buzzers_nursery_rhymes_free.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_off0000d080.bin
7597434bc55723d7dfa323de9f79a245456903cb5c7f05a7ec7be92301877868
pdf-font-stream PDF embedded font (sfnt) at offset 0xD080 5652 bytes
font_01_sfnt_off0000e3be.bin
56b88dbd6f09a8930358f05091581446e413b8729a49698772abe1ed55aca178
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BE 4544 bytes
font_02_sfnt_off0000f4cf.bin
1ae2d9c779b7681204928f02e548478e9832b6738591ce31462fd4b894eea508
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CF 11180 bytes