Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dcd7ba456dae966…

MALICIOUS

PDF

93.1 KB Created: 2021-06-30 05:16:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 22e9c1f01410cc51912c90215b8a6c13 SHA-1: df5a25891edd35e906eb3d3e447cc80a7cb83c96 SHA-256: 7dcd7ba456dae966037fd26ab751c83d96314c248becd6276f015c658062a236
156 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, indicating it likely contains malicious content or exploits. The document functions as a link farm, with numerous URLs pointing to external sites, some of which are hosted on compromised CMS uploads or disposable domains, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the presence of multiple external links and the high ML score strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://sva-jeanroze.com/xmedia/file/jeribep.pdf
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/567a2093b5a21ffcc6d44e87aa4307e1/48054687813.pdf
    • https://xo-sound.ru/userfiles/file/27965293320.pdf
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/0bd9f3197d9590ccc07074fe873977db/35977424171.pdf
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/2cc6bp5kvjdq5kumovm2j84d43/37810350551.pdf
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/cb27175e85d5af35eea6d5a768375993/kixitafamepijesosufexekux.pdf
    • http://sostrevalli.it/userfiles/files/jajadufigotogipa.pdf
    • http://alexlunacoach.com/img/editor/file/12527396680.pdf
    • http://myshopgroup.com/userfiles/files/bojigokutujigeda.pdf
    • http://seoulsquare.com/userfiles/file/82709642949.pdf
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/0e59eda060b66bbcd26aae1cad827b57/wuzezawakenibijomixodu.pdf
    • http://re-view.online/fckFiles/file/lowofo.pdf
    • https://hophamthaibinh.com/upload/files/62071293049.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/ljt5ugmc4q7oq0hnp5fqn42cm0/54936056045.pdf
    • http://beloezoloto.ru/userfiles/file/namiborenapiwulakomub.pdf
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/1ebb4cdf663c2789dd284e0e48507851/15715375786.pdf
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/66aff5736c8ae93d535ee2b6cb7f4f8a/67003982180.pdf
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/13ovu4aourpm7o4hart01kdf77/bulodanepudaboxemer.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160ac9731cf5a7---27718502078.pdf
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/969dbded6149235f65005a7858b58284/98160830969.pdf
    • http://creaorganization.com/depo/sayfaresim/file/2200422880.pdf
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/13100c3ab89ec94612e930f4a351127d/nesalesalekewa.pdf
    • https://hanahana.vn/media/ftp/file/rufeza.pdf
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607937ab20b94---25995921869.pdf
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609df7e7d5bf2---49282532853.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=best+way+to+get+rid+of+love+handles+male
    • 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_off000108f2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x108F2 16792 bytes
font_01_sfnt_off00012104.bin
1e9864c27b53a79214032a7ea82c87c4d7350b054dedb01f4244bd4864a017c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x12104 16476 bytes
font_02_sfnt_off00014b96.bin
835a99aadc5a6a6500f36093cb56a61e6c838c16440980a9b26fdc98547e1704
pdf-font-stream PDF embedded font (sfnt) at offset 0x14B96 11120 bytes