Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcc3e75012999380…

MALICIOUS

PDF

75.6 KB Created: 2021-05-15 18:49:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7de05eda73aa54b5465e579b54129c72 SHA-1: 73f9686ed7c960bbdf308382bdb54e42d5bcfcb7 SHA-256: bcc3e75012999380e3141a5a9cd9d94ac6babe2ee46772113798ae17cbf526a7
186 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, many hosted on disposable domains, indicative of a link farm or phishing operation. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs point towards an attempt to redirect users to malicious or deceptive content, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/strik?utm_term=zoom+g1on+manuale+italiano
    • https://cdn.sqhk.co/revinoxu/hhjhxxf/popping_bubbles_game.pdf
    • https://cdn.sqhk.co/dejuroli/haNVher/92650257195.pdf
    • http://gomijojupi.iblogger.org/news_report_tagalog_tv_patrol.pdf
    • https://cdn.sqhk.co/tobowovum/ajdPjez/42905367232.pdf
    • http://lulumel.66ghz.com/11186976117.pdf
    • http://bupojew.22web.org/carter_page_fisa_warrant.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pezofut/93868513501.pdf
    • https://dcc20dec-0195-4543-b617-cfb82efd15f0.filesusr.com/ugd/30ea26_94994f44ca7f4a2ab05dc58ecdb46dd6.pdf?index=true
    • https://51956041-da35-40aa-96c1-085c1f47c80d.filesusr.com/ugd/e6e573_3e62be6c559d4c1ea7e5914e042e00cd.pdf?index=true
    • https://154530d8-637b-49d0-b90a-43bf07a176fb.filesusr.com/ugd/59359a_061152d0a51d4469ac0bee6d523d1b49.pdf?index=true
    • https://1a447ccf-a6a5-490c-ad31-399ae8169532.filesusr.com/ugd/cf5184_b529315133134058aad4b99dce54006b.pdf?index=true
    • http://kijemuf.epizy.com/32979097585.pdf
    • https://6c639bf1-704a-4500-b661-329758898742.filesusr.com/ugd/02d620_8e8a6dab918247ecbfd97b2bd10259e9.pdf?index=true
    • https://1dd76345-5b2e-44f5-846d-442de322665e.filesusr.com/ugd/e3c460_0ae98ee0b5ee45ce8948e498f23f72a3.pdf?index=true
    • https://9e2901ea-5d25-41a5-867c-54d0774c6e48.filesusr.com/ugd/4d0f37_02862d9bf8054d44b9ce78b1c8745b7d.pdf?index=true
    • https://46fb9a51-9e16-4ad8-811e-2f7ed01702f7.filesusr.com/ugd/53363c_77313e2917324555be98ce005620d245.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ff4ca40d-0ae9-4e68-9b46-3f65784cfe1d/potirew.pdf
    • https://uploads.strikinglycdn.com/files/f0673f18-eb9f-466f-b5ff-b0b6ad4011ff/how_to_use_game_controller_with_fire_stick.pdf
    • https://uploads.strikinglycdn.com/files/d71553c8-fd83-443f-9aa1-2690e364dd00/learn_how_to_be_a_cashier_games.pdf
    • https://s3.amazonaws.com/megodipewukitoj/fonigupaxezawenatasisi.pdf
    • https://s3.amazonaws.com/bubeto/au_clair_de_la_lune_ukulele_debutant.pdf
    • https://s3.amazonaws.com/lupebesu/35320841756.pdf
    • https://1a6defe7-92a0-4357-8a70-d3bce85d30c9.filesusr.com/ugd/385065_6ae722cd077744cbaf8b6f3db6ab2d29.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_off0000eae8.bin
bf68023e041a22eff26ec42f4a5aa19b4a9fcfe1bae0a2ff5c08b694863b4dd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE8 4740 bytes
font_01_sfnt_off0000fb03.bin
55b306f2785fdf70bfe5bf287535bdf920fdb309bd9c2dbe76bba32e98aaa218		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB03 11224 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.