Malicious PDF — malware analysis report

Static analysis result for SHA-256 b69ad66601250240…

MALICIOUS

PDF

73.9 KB Created: 2021-03-12 21:43:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb50532da1adc41275455ce31e499c56 SHA-1: 5fe501a7a4a76211012aa34dc8b1a54d3129b951 SHA-256: b69ad66601250240bedef57fcfdcd07c6b9cca71839aaba60073d1462e886b06
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one identified as a potential link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malware. While no scripts were directly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://botokaw.ru/123?utm_term=carcinoma+epidermoide+cavidad+oral+pdf
    • http://cupe1.ru/jhene_aiko_album_download_2019259fi.pdf
    • https://cdn.sqhk.co/lisakopew/iaiai8U/giant_unicorn_slime_simulator-_rainbow_slime_games_online.pdf
    • http://terem.space/158205409698i3ki.pdf
    • http://idealica-italiauficiale.website/jopefasunalaxojakonawm5s53.pdf
    • https://cdn.sqhk.co/xuxiropuwomo/jWfjdhh/events_today_near_me_now.pdf
    • https://cdn.sqhk.co/pumibavi/YidDD9u/tagebejimagifafilaroloku.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://c6506652-bf5e-4f52-be36-03dbfaede22c.filesusr.com/ugd/f74919_4838a9f39cf6425c913e24b9444c9a9d.pdf?index=true
    • https://d0a6b1b1-1773-4622-8b5e-0ab5990a7ed3.filesusr.com/ugd/b90ba1_83b38c3812e945758e01a1de266ee551.pdf?index=true
    • https://6a1e2a5f-c456-4288-b9d5-5378f87870fb.filesusr.com/ugd/076fac_aad219f5a20944f0bfd0e830e4f3d783.pdf?index=true
    • https://uploads.strikinglycdn.com/files/408d4706-85fe-4362-ae98-b8edb41f3c9c/rosozadobojovefu.pdf
    • https://s3.amazonaws.com/dekogamik/prison_escape_2_walkthrough_guide.pdf
    • https://56076a71-1b70-41e8-afe1-d547c394b4ee.filesusr.com/ugd/ab0d05_09e7424728744419857f5f54e92efc93.pdf?index=true
    • https://356bbf58-84af-4bff-99a9-d03346e46411.filesusr.com/ugd/b5472a_e4100d13207744cdaa674ea8c5a65fd2.pdf?index=true
    • https://8c17aa34-c454-4d6c-a218-8929c845e329.filesusr.com/ugd/808cd0_de85fd54617b4aa3a202f4a6a600d596.pdf?index=true
    • https://7fc1e5b2-1dd8-4457-9de2-3dea1ab9f589.filesusr.com/ugd/fedd61_0417b5c0cd1e41ae9d1a05003945b25b.pdf?index=true
    • https://460eb545-5389-4aa9-9e78-d1074a8bca0c.filesusr.com/ugd/21a131_f214fd7e95a34826bf0d59aa96bceedd.pdf?index=true
    • https://72cee60b-533f-4fda-9f40-87b1bb6f0553.filesusr.com/ugd/590778_bbf16aafe09142de97c77f64efade6a8.pdf?index=true
    • https://s3.amazonaws.com/pegek/5940296034.pdf
    • https://d1159ab4-cbf5-42eb-897b-83a5e94cd7da.filesusr.com/ugd/536122_df7f4558b1a14d298a7d5fd689ac7b25.pdf?index=true
    • https://uploads.strikinglycdn.com/files/61658d00-4b75-4474-93ea-31a36a831360/59430554113.pdf
    • https://uploads.strikinglycdn.com/files/46ee4aba-5461-4bb9-a7fe-7d795c064953/88106676098.pdf
    • https://uploads.strikinglycdn.com/files/c6ada4f8-f7a7-4d32-8607-c3aa9e1af7da/how_much_to_replace_samsung_tablet_screen.pdf
    • https://uploads.strikinglycdn.com/files/e319b297-9bfc-4f9d-a03c-46c34443b4dc/58375942778.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_off0000e59c.bin
69e31f742de0c79b39eab510d1c7f7671809b3c431f9f68dc0239f60cf55b485		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE59C 5088 bytes
font_01_sfnt_off0000f6da.bin
027cd78803f140f777c9d291b082ca79652313c4e65657d05133ab31e8b2f228		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DA 10384 bytes

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