Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccdba644d3d2f528…

MALICIOUS

PDF

78.8 KB Created: 2021-08-16 20:50:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b934c484f4261a92d36cf4c041d5dc8d SHA-1: 6b141f731389a371102e6e01a89b4fb43fd46b14 SHA-256: ccdba644d3d2f5283836a764a5ac5aa39859a2cc6de6a281580ebcd6b87c462b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing or trojan delivery mechanism. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the ML classifier's high confidence score indicate a strong likelihood of malicious intent, likely to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crysiq.ru/uplcv?utm_term=sears+craftsman+garage+door+opener+remote+troubleshooting PDF link annotation
    • https://network-italia.com/file/46596530389.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e45fb5fde---79885185776.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b20cdb92113---65186608794.pdfIn PDF document text
    • http://aktifimmo.lu/userfiles/files/43290246939.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/2980e38cf0e18083b60ef0040bb9865d/zawonimamixo.pdfIn PDF document text
    • http://freeski.hu/freeski/file/60081695397.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/a87f27fa01fcc14f75d4dd644eabcb06/zixibatakidil.pdfIn PDF document text
    • https://pachetedeturism.ro/images/files/lajipe.pdfIn PDF document text
    • http://parkhighclassof60.com/clients/871169/File/xubifuxofavamitinuworu.pdfIn PDF document text
    • http://vinczeandlaszlo.com/upload/vazogiwafopexawodid.pdfIn PDF document text
    • https://cplastik.com/data/cms/file/fipakotonuwirugozek.pdfIn PDF document text
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/8qi81r4p5ehohnu6se6kbgf1ck/loleropevepetane.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f780714e47---lopaxe.pdfIn PDF document text
    • https://munord.com/wp-content/plugins/super-forms/uploads/php/files/bacf71eb99e6ef96ff42358eed6af8c5/bileduwekizijeji.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/b9ac6ae1fe44a9dd1f0f97191f318ed9/8027931147.pdfIn PDF document text
    • http://www.cddfct.com/up_files/file/34182433522.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/8c7f4727187f756d50697855c71eaa7e/vutukiwa.pdfIn PDF document text
    • https://tavio.ru/files/file/79664679665.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/8f56be856f94372cdb315e4eaa3f82f8/69798390984.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/7ea1f0a6ff58c2d6d7121a3d4020ede1/dukijemuzop.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba833332098---pojemo.pdfIn PDF document text
    • https://banghenails.com/upload/file/kagekesavebaz.pdfIn PDF document text
    • http://simonide.org/userfiles/file/15187624116.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDD1 11380 bytes
SHA-256: 0313076fc6382efaca3793b5bc4e83b7bbde1b4b568a7709ff6e5b2f748890fb
font_01_sfnt_off0000e7ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7EC 16372 bytes
SHA-256: 24f22910a2885ac93fe1e8ed4972df7f8d363301fbf135db45a926c2fe351bc5
font_02_sfnt_off00011263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11263 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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