Malicious PDF — malware analysis report

Static analysis result for SHA-256 458dd609d7bbd6a1…

MALICIOUS

PDF

72.6 KB Created: 2021-04-07 03:19:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44abcec3da30a66de53720347f093157 SHA-1: d507b4f4b189e25ea9d5025e6bef7d0140bb1460 SHA-256: 458dd609d7bbd6a1d089ca9a13421e92ef434931ca1aa67d814535b9c2665951
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URL that, when accessed, likely leads to a phishing or malware download site. The document body, though heavily obfuscated, appears to be a lure related to a book title, suggesting a phishing attempt to trick users into visiting the malicious URL. No scripts were extracted, but the PDF structure itself facilitated the embedding of the malicious URI.

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://ponafet.ru/award?keyword=auditoria+administrativa+benjamin+franklin+3ra+edicion+pdf
    • http://chisto-chisto52.ru/good_country_2_step_music5387a.pdf
    • https://cdn.sqhk.co/jezaziritav/hRVu5YI/hypixel_bedwars_map_rotation_november.pdf
    • http://voirlo.xyz/cocoapod_podfile_platform3ahf3.pdf
    • https://cdn.sqhk.co/wotutovebo/hrOXiiz/get_vexed_in_a_sentence.pdf
    • https://cdn.sqhk.co/tupipitijil/Jjbihif/14648379875.pdf
    • http://mirror-x.org/314067183275cmx2.pdf
    • http://creditstar-kabinet.com/how_to_anoint_oil_ldsp79bs.pdf
    • http://tvoyoproc.fun/ib_grades_boundariesuy3fi.pdf
    • http://usmileofficial.site/genupcor3h.pdf
    • http://hiziryigit.online/27958615527hrm33.pdf
    • http://vkysnaya-eda.site/how_to_replace_epson_et-3750_maintenance_boxmlnc4.pdf
    • https://cdn.sqhk.co/kidatufo/ielhegw/new_3ds_xl_super_mario_world.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://c69a8150-bb1e-4c46-878b-fc1622391bd7.filesusr.com/ugd/cf91d6_b4be1ac05c044e0391657bba2fbd8e10.pdf?index=true
    • https://8641c524-1fb5-4292-87ed-dd72f64d6c22.filesusr.com/ugd/9b7d8a_c6c421c71f9e41e5955e295a7d1f436f.pdf?index=true
    • https://27a83426-c768-4525-a63d-b5b732cca755.filesusr.com/ugd/28b3f7_a28baa6679a54f6db84ba03370d5c0eb.pdf?index=true
    • https://ae8c1479-5121-4009-b0ed-8259dbb1205b.filesusr.com/ugd/0aff45_4ff5fd72b9364b1e969f901a68392508.pdf?index=true
    • https://a6668164-4238-4e0d-addb-cc4c62f58fca.filesusr.com/ugd/2dfcca_82e47f1775bf41b2b66a0a864067c8a0.pdf?index=true
    • 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_off0000da37.bin
80b89734602cf98f59d1023718c93c11e2ce201e68697f108ac02e9492dd2c0c
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA37 5796 bytes
font_01_sfnt_off0000ede8.bin
63019751bf4e3de47f133174680eec47b9008c05744861e5e0088445a6735fae
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE8 11524 bytes