Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbc6eb11fc3308ab…

MALICIOUS

PDF

74.9 KB Created: 2021-03-20 18:25:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d63a6fcade4d476f96a9009a4551b68d SHA-1: 9dafcda20ec18624d91e295727d80abe66792a2b SHA-256: fbc6eb11fc3308ab8d04cb7a9e98b2eb1c459a30e8079aaff761410ff88d0912
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://golowaki.ru/wix?keyword=modo+de+produccion+capitalista+resumen', which is likely a phishing lure or a distribution point for further malware. The document body, though heavily obfuscated, appears to be an attempt to disguise the malicious nature of the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://golowaki.ru/wix?keyword=modo+de+produccion+capitalista+resumen
    • https://cdn-cms.f-static.net/uploads/4384046/normal_602d520809f67.pdf
    • http://dreabling.online/dekukibajc5arq.pdf
    • https://static.s123-cdn-static.com/uploads/4370267/normal_5fef68ec737c5.pdf
    • https://cdn.sqhk.co/josedinis/rQm7Wia/soccer_penalty_kick_football_shootout_challenges.pdf
    • https://mawovajexajadow.weebly.com/uploads/1/3/0/8/130874262/a668e54aebaaf94.pdf
    • https://xojinumawot.weebly.com/uploads/1/3/4/3/134377449/6fd289198535c38.pdf
    • https://cdn-cms.f-static.net/uploads/4412160/normal_600ca1d3e7e50.pdf
    • http://55571.ru/minn_kota_ultrex_112_us2_trolling_motor_w_i-pilot_storestqjop.pdf
    • http://ledimpress.biz/2686426168x8fjm.pdf
    • https://cdn-cms.f-static.net/uploads/4410020/normal_602553be38b47.pdf
    • https://cdn.sqhk.co/gidetixi/ByjdRhf/16131836519.pdf
    • http://help-violation.com/cat_training_bookf9a6i.pdf
    • http://site-shop.xyz/gotaxuweos3pt.pdf
    • https://cdn-cms.f-static.net/uploads/4370273/normal_603c02ce6008e.pdf
    • https://wesuzijuto.weebly.com/uploads/1/3/0/7/130740493/3100128.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://b993c520-4fc9-488d-8dda-35d8b3dc2713.filesusr.com/ugd/6f5492_31fa02998b104bb2bb7e88f524e7623c.pdf?index=true
    • https://a5a8f6e1-24ae-425c-880d-6f4079e3c376.filesusr.com/ugd/035627_6b772d1652fd47ffad8be8860ffe454f.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_off0000e50b.bin
4ca4b65aef27ba70329760dcbf90ed5705d03ac44a19e69997ba85a42e916731
pdf-font-stream PDF embedded font (sfnt) at offset 0xE50B 5224 bytes
font_01_sfnt_off0000f6c0.bin
9e9e069b8b7a69f36be0b9f4cfe6446cd143cc3ae29317a107312cd70687d890
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C0 11780 bytes