Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e62229f4cc00cf2…

MALICIOUS

PDF

68.2 KB Created: 2021-09-16 13:43:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 15675394429d88826d2a8878ca744e7b SHA-1: 5c82ff7706b8f43cc773de8b38263860cac35cdc SHA-256: 9e62229f4cc00cf21fbcfb133d0a956d598d7e9aa6a3f1f38ee4d15a8e76c947
156 Risk Score

Malware Insights

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

The PDF contains numerous links to various domains, many of which are flagged as link farms on disposable hosting or compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, but the structure and heuristics point to a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://sjhtractor.com/d/files/gekedugibizegifuwugi.pdf
    • https://badeluxe.com/userfiles/files/7757197101.pdf
    • https://westhygiene.hu/editor_up/35578744658.pdf
    • http://artstudiodesign.it/userfiles/files/tivofonijati.pdf
    • http://tiwtactic.com/userfiles/files/ladumepebidijara.pdf
    • http://blueyee.com/upload/file/072119084920.pdf
    • http://zjbfjt.com/upload/files/109815396.pdf
    • http://www.farmaciabergua.com/userfiles/files/lonesaduromami.pdf
    • http://angelcabrera.com/FCKfiles/file/xaxunozuwaminawomedejiwel.pdf
    • http://architettobotteonpierpaolostudioabacus.it/userfiles/files/migodefafi.pdf
    • http://rotarycochinharbour.org/ci/userfiles/files/kapokumukarelamugumuzewam.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fa143b18a4---kabuwumanojevenis.pdf
    • https://loyallcanada.com/editor_files/file/1454472297.pdf
    • http://belv.ru/userfiles/file/1120393002.pdf
    • http://bolshunoff.ru/images/wysiwyg/file/manikutokidezabex.pdf
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/16142400949099---duveritajimesumo.pdf
    • http://crmrealty360degree.in/userfiles/file/40148758792.pdf
    • http://xn----7sbakif2a3azdub.xn--p1ai/admin/ckfinder/userfiles/files/newoduwazozodiji.pdf
    • http://wu-pao.com/upfiles/editor/files/fasefibogofadakopu.pdf
    • https://rpaxis.net/userfiles/file/8718747985.pdf
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137783043ec1---befajavutenalavejune.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=new+york+full+movie+filmywap
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ac2e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC2E 16792 bytes
font_01_sfnt_off0000c445.bin
2230c1debb40104225942e2e61dd37c5df5d320643201d3bdf507cc6e9be88b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC445 10584 bytes
font_02_sfnt_off0000dc81.bin
3d6c0bfd58215de17484b71e92cc8dc509efee633391613bf52640f94970c139		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC81 15368 bytes

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