Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0a8f1384aa47af6…

MALICIOUS

PDF

72.3 KB Created: 2021-03-15 08:33:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a637ac276ef382356c4139c1efb87d37 SHA-1: d16fe9ca1dc57c56fd250e84c84f4a00b7faa85c SHA-256: d0a8f1384aa47af61909ce6c307f647da4e0f390f752bf41350906d43c28fe40
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 multiple embedded URLs, one of which is directly referenced in the PDF metadata and heuristics, suggesting an attempt to redirect the user to a malicious site. The presence of PDF_URI and EMBEDDED_URL heuristics indicates the document's intent to leverage external links for malicious purposes, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/wix?keyword=nihil+slayer+guide
    • http://pifafixejizigu.scienceontheweb.net/area_of_triangle_worksheet_6th_grade.pdf
    • http://1xbet-regi.site/washington_state_football_coaches_show3uowp.pdf
    • http://rijewomel.scienceontheweb.net/62735693181.pdf
    • http://bosnoslovnoejelaniekupit.xyz/bleacher_report_nfl_picks_201902qm3.pdf
    • http://grusha.space/my_btc_wallet_12hbxz7mzn3lgt3sjcss6ys4tvefpbwcptz2wwq.pdf
    • http://distornyup.site/ragalusisuzowigatalelajaj3y26.pdf
    • http://zutatowatipo.mywebcommunity.org/candy_luke_davies_download.pdf
    • http://znakomstva69.space/311060861039cucm.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://21dbc830-6d60-48ad-8ab0-00d2b3cb69e0.filesusr.com/ugd/18d949_35581f1eaf5a446eb0e6ec06697f5479.pdf?index=true
    • https://98748e4b-3258-471a-903e-8ea98415cca0.filesusr.com/ugd/fd7405_db45e8f644f64aa492b50c3c6c754093.pdf?index=true
    • https://89e5ed4a-33eb-42a6-b5f1-9fc07ea1e15b.filesusr.com/ugd/ff68bb_45c05c9e680f4a1d9110656ffb02f44b.pdf?index=true
    • http://wenibeliso.atwebpages.com/can_you_download_garmin_maps_for_free.pdf
    • https://b01cffea-7a05-49e8-9781-04202a21c04b.filesusr.com/ugd/d5d855_e14a6ccec3bc44c9a4f1484bb175a6c5.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_off0000ddf8.bin
aa630feb88283fcae1120953ed90f019f1ce0a00908def812c3c349a4175a9dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF8 5160 bytes
font_01_sfnt_off0000ef87.bin
7a82f844870e32711844d72aceb5f0735210747b491ec89c15622db867b7deaf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF87 10932 bytes

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