Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4ac9cc0c857fc3d…

MALICIOUS

PDF

76.8 KB Created: 2021-02-24 08:47:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 04539432aed21949b9be031afcac6f66 SHA-1: 8b72bfca3026c713fe278020d8f7f61e6c99fdf7 SHA-256: e4ac9cc0c857fc3d6c29210bea78aea797476e2f06e3e366bc1db2844ae80719
96 Risk Score

Malware Insights

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

The file is a PDF document flagged as malicious by ML classifiers and ClamAV. It contains an embedded URL pointing to 'bologen.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains text fragments that might relate to a product purchase, reinforcing the lure. No scripts were extracted, but the presence of an external URI suggests an attempt to redirect the user to a malicious site.

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/strik?utm_term=ue+megaboom+3+buy PDF link annotation
    • https://cdn.sqhk.co/temazajilib/hagdjcj/pounds_to_grams_to_kilograms.pdfIn PDF document text
    • https://cdn.sqhk.co/pukikojat/yiaijh5/buddy_the_elf_throwing_snowballs.pdfIn PDF document text
    • http://copyright-securityx.com/hiv_and_aids_education_care_and_counselling_6th_edition_downloadn5hyw.pdfIn PDF document text
    • https://cdn.sqhk.co/gasupewu/hcgggey/genajugodujero.pdfIn PDF document text
    • http://bobr.space/76971755602v9dvy.pdfIn PDF document text
    • http://wrinklestiltskin.com/baofeng_uv-5r_plus_istruzioni_italianops79a.pdfIn PDF document text
    • http://precabinets.xyz/editing_marks_guides60x3.pdfIn PDF document text
    • https://cdn.sqhk.co/litopozuf/gjhigYP/93436006739.pdfIn PDF document text
    • http://prosale.company/fireflies_piano_sheet_musicnlzw0.pdfIn PDF document text
    • https://cdn.sqhk.co/jenotonolo/58zjc2Q/convert_electric_meter_reading_to_kwh_calculator.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/variables_and_expressions_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/53109887457.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/appetizer_menu.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/android_builder_pattern_example.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/cheat_sheet_means_in_english.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CA 5096 bytes
SHA-256: f148af516a3c21c84f41439f04bdb5efeb3897e1233555c9bc9171dc5f2845df
font_01_sfnt_off0000fb22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB22 12724 bytes
SHA-256: f83f4f2611ee4c526488d57081c55023fd1ea0135aca60473302818d08598ee3

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