Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cec2e45801a0a14…

MALICIOUS

PDF

82.7 KB Created: 2021-03-29 02:43:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9257b9a68f3ec21887500433721806ce SHA-1: dabfecb7e8f5819379c10cf44663a011220ed27b SHA-256: 8cec2e45801a0a148b311890eb1f067972391299e19acf3c20d20895261336d2
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://soxebez.ru/award?keyword=bible+book+in+english+pdf', which is likely a phishing lure. The document body, though heavily obfuscated, contains metadata indicating it was generated by wkhtmltopdf, a tool often used to create PDFs from web content, further supporting the phishing pretext.

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://soxebez.ru/award?keyword=bible+book+in+english+pdf
    • https://zegazofegu.weebly.com/uploads/1/3/5/2/135296009/pefixowov-zinekugageveji.pdf
    • https://nupepapeziwib.weebly.com/uploads/1/3/5/3/135319604/4df39dbbde01459.pdf
    • https://tolajugim.weebly.com/uploads/1/3/4/6/134647220/katodiziv-tifugovilavet-woxofoma-zosimelu.pdf
    • http://beautytopshop.site/how_many_calories_in_a_dunkin_donuts_medium_hot_coffee_with_cream_and_sugar4la3g.pdf
    • https://wevinosoz.weebly.com/uploads/1/3/4/4/134444327/vumanofigiliziwaja.pdf
    • https://fuvejewitopi.weebly.com/uploads/1/3/1/0/131070508/4275177.pdf
    • https://kapukafasid.weebly.com/uploads/1/3/1/4/131437878/2970060.pdf
    • http://helplnstagramcontact6088757.com/gekanimavup02634.pdf
    • https://xewulatejema.weebly.com/uploads/1/3/5/3/135345986/700505.pdf
    • https://soxiwavarado.weebly.com/uploads/1/3/1/4/131437421/miponozi.pdf
    • https://lokejefu.weebly.com/uploads/1/3/5/3/135301848/4278685.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/69820753-381c-4568-b5d6-f47afedb8b7d/gerusolikeposoto.pdf
    • https://uploads.strikinglycdn.com/files/5683c959-9272-49bc-9174-af835ad16afb/how_to_open_a_nordictrack_treadmill.pdf
    • https://s3.amazonaws.com/kisagoz/vobebebibubuf.pdf
    • https://uploads.strikinglycdn.com/files/5268e527-4364-405c-bc34-2d1cb887b1de/9644823825.pdf
    • https://uploads.strikinglycdn.com/files/91b37133-cb81-46a3-bbc3-f44ab9be3978/40736589622.pdf
    • https://s3.amazonaws.com/makixibawumebol/how_to_download_music_to_eclipse_fit_clip.pdf
    • https://s3.amazonaws.com/pukaridimupo/walch_integrated_math_2_answer_key.pdf
    • https://uploads.strikinglycdn.com/files/a9c6f853-d8f0-45ac-bc8e-8b2ea4d906fb/kobalt_wet_tile_cutter_parts.pdf
    • https://s3.amazonaws.com/jedadokuti/kenmore_gas_stove_top_replacement_parts.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_off00010573.bin
39569a45331a48a37b3d0727655cb352c3f31a34a7565cfb292e18973041bec3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10573 5248 bytes
font_01_sfnt_off00011751.bin
77d08af10b208a0171ddc143a96c4242ebdbcd9b07325691fab5c39f2189122c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11751 10668 bytes

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