Malicious PDF — malware analysis report

Static analysis result for SHA-256 54c8615d3408f493…

MALICIOUS

PDF

73.5 KB Created: 2021-02-22 11:43:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e62ab57817582b65c86cffd908d1fa4 SHA-1: 3a1687544165f4ea76c7ef4ac7386be16c65c31c SHA-256: 54c8615d3408f493e7349e778cb90ec306d99cdd1c6a10f57e2c1d037a938531
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely used to deliver a payload or conduct phishing. The document body is heavily obfuscated, suggesting an attempt to hide its true nature.

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://bologen.ru/wix?keyword=directv+guide+miami+beach
    • https://cdn.sqhk.co/fuwufupi/jiihdbg/santa_girl_run_game.pdf
    • http://vostokzapad.su/796097010157971h.pdf
    • https://dusonomikeka.weebly.com/uploads/1/3/2/6/132695238/tojewula_tamaderukumo_tevozu_dobetovet.pdf
    • https://vamekatowozi.weebly.com/uploads/1/3/0/8/130814347/8977555.pdf
    • http://shoop-fm.ru/37061132749959qr.pdf
    • http://capridigi.com/mevuzuzebu2oddy.pdf
    • https://wosiwimobej.weebly.com/uploads/1/3/1/1/131164223/zudamef_pumasiv_lipeke_wilirekim.pdf
    • http://gdztut.com/pcaob_audit_report_example9euai.pdf
    • http://axecheat6.xyz/10th_class_maths_notes_inza56d.pdf
    • https://cdn.sqhk.co/perikowep/XAieghH/69562950651.pdf
    • https://fusajowaxoxa.weebly.com/uploads/1/3/5/3/135344195/xosigowawibidorijad.pdf
    • https://cdn.sqhk.co/ragejeli/cgh6jfp/puzzle_dragons_characters.pdf
    • https://wonikisemuk.weebly.com/uploads/1/3/4/9/134902350/fewetogakarixero.pdf
    • https://cdn.sqhk.co/gulaxemetila/eJaZoih/atari_2600_emulator_online.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rawesaragegugar/icu_full_form_in_english.pdf
    • https://s3.amazonaws.com/rubidokezive/mailmessage_c_attachment.pdf
    • https://s3.amazonaws.com/turip/why_is_my_wallpaper_steamer_not_working.pdf
    • https://s3.amazonaws.com/gopuze/ba_exam_date_sheet_2019_punjab_university.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_off0000e3b6.bin
cad07e4d1abb0bb8ff92c83aa963d66e2c64d6010595d7522904a98826a5d09f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B6 5340 bytes
font_01_sfnt_off0000f5be.bin
596b25b4e485c1df07a8f66e37dc4b5d59c46f5228c33dbfc505219f85848e33		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BE 10240 bytes

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