Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d064ce0e4bf6acc…

MALICIOUS

PDF

93.4 KB Created: 2021-08-12 07:30:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e2d4dd419c938737452974a586c21833 SHA-1: 2f6e2ad9929e02a395f09a6bf3ca95c83ae4f684 SHA-256: 0d064ce0e4bf6acc97a068fa98634eb5c58581f68cbceb5b9cc2fde55efe783e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains numerous links pointing to various domains, many of which appear to be compromised CMS uploads or hosted on disposable infrastructure, suggesting a link farm designed to distribute malicious content or phish users. No scripts were extracted, but the structure and URL patterns are consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://booknowrentalimo.ch/userfiles/files/bobikalolejavugafa.pdf In PDF document text
    • http://tauben-buchmeier.de/kleinberliner-schuetzen/userfiles/files/170965493.pdfIn PDF document text
    • https://commonwealthsportsawards.com/userfiles/file/76628551495.pdfIn PDF document text
    • https://digireg.nu/upload/7441047787.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089c0409034f---59680628404.pdfIn PDF document text
    • http://marinda.ru/pics/images/file/75222162901.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160fb39518c282---nemip.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/sigukozirirube.pdfIn PDF document text
    • https://canevastoilestjean.com/upload/editor/file/7619616187.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/7oeda7h78jtcsv4rmes1v2mmiq/37364981844.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/d64809f20240e3527fbfc4e3c717ec08/24486547494.pdfIn PDF document text
    • http://zimaletto.com/uploads/file/25729048420.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c2ba0380a---91818637561.pdfIn PDF document text
    • http://acrclubinversores.com/files/galeria/files/62804918756.pdfIn PDF document text
    • http://stpatricksreunion.com/clients/84553/File/89159060601.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/39372795026ac9c3fd8ba65e565bab7c/vujagiwojaniwinu.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/gowajoparorugememen.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/c1pg8ubg89p1mdh3orjt5glk5d/vedoki.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/ef9f07edd174d92b468da0da7f1e6a46/73296422242.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/b01cf2f6a6ebfbec97db531dbc286209/zoputefelifudepadarujiba.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021070805593673499.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160764b20a1605---ruwovuketusor.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/u9nruo77mrur9h64gko7sobvhf/lizawuwebijugowopu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=best+broadway+musical+scores+of+all+timePDF link annotation
    • 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_off00010773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10773 11024 bytes
SHA-256: 2b288e3f0899024362705e0c6c78d21fdecf211b14f501c7712b86e5fb83639b
font_01_sfnt_off00012140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12140 18008 bytes
SHA-256: a0382656944d899ba635effeb3416fc9e83f128bbf4542376ee15ed0a402cb4f
font_02_sfnt_off00014fd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FD7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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