Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b677285aefa98c1…

MALICIOUS

PDF

89.3 KB Created: 2021-07-03 10:23:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ee6ae7a3db2cb65095336fb0f3a4058e SHA-1: 2655a864fd355df53f020c060bacdecfc2a5379f SHA-256: 8b677285aefa98c15992cf905a131c59b99c93a044c363a3be96915a9fe81ae6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous links pointing to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms indicates an attempt to lure users to external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://garglob.ru/uplcv?utm_term=how+are+you+all+in+spanish
    • http://omonetach.pl/foto/ilustracje/file/takisefogikukagokatunefi.pdf
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160cfeea7081da---61507433986.pdf
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607072ef5bdbd---62104870457.pdf
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/681e0dd48a494084cc32af661e1098a5/kiwewovefexenijobutem.pdf
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/e856e5c7d2ad9cc1f530abafe60791a8/womereta.pdf
    • https://aravlicraft.com/cmsCart//upload/file/36220265721.pdf
    • http://szao-spb.ru/images/news/file/jiwopuxizoxune.pdf
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0cc3887597---vomotajavuwe.pdf
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/64020a0569a0f0ceff3bda0a154fdec0/40940759676.pdf
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f408b26afc---mapigewu.pdf
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/d602b61018b94351eea38a2335d5ab2e/gunedofarogesasefuxe.pdf
    • http://aarogyamedico.com/userfiles/file/79809791316.pdf
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/9467666dbe5a6e2a92ac6ec03482b02e/29779457851.pdf
    • http://grandinhr.eu/images/user/file/waravuxitogusagirazijowa.pdf
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/eh318b7v6moopnvji30k4bg9n2/mopawebuvuwosezu.pdf
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/tvcsfqlimie1q4m463b4qdnr55/63423182868.pdf
    • http://bong-dem-long.org/upload/editor/files/talepopejezoxidanodiked.pdf
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/078a41e705ebeb5c0b18bc8c3a32c678/remopejunodij.pdf
    • http://cheers-gifts.com/userfiles/pileb.pdf
    • http://cablexconsulting.com/Upload/file/8823407751.pdf
    • http://sanarina.de/ckfinder/userfiles/files/70634049856.pdf
    • https://decoveinvestment.com/userfiles/file/29513943822.pdf
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac07baf853---joromexajegegon.pdf
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b6cf6597548---16599983489.pdf
    • https://piuspvc.it/userfiles/file/lugegevugelidodun.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160880767bb5ed---panujatusalesupego.pdf
    • http://rudolphalexander.com/uploads/files/sudiruzokekezeforepiku.pdf
    • 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_off0000f75c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF75C 16792 bytes
font_01_sfnt_off00010f6e.bin
1a28b5370d913f0deb75723386cdfafaa1b7c4cc9e7dc9a48c73198ce74c983d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F6E 18672 bytes
font_02_sfnt_off00013fcd.bin
491caf098d9ffa1551964aa1c5574efda87c9507f05733547955e2f234670c70
pdf-font-stream PDF embedded font (sfnt) at offset 0x13FCD 10544 bytes