Malicious PDF — malware analysis report

Static analysis result for SHA-256 34ddcecf4445cfbc…

MALICIOUS

PDF

78.5 KB Created: 2021-06-28 00:30:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 49062b784dd12c1741337637c11f60c6 SHA-1: 42eb7f674a54793e9b395249457a9e69a99b229f SHA-256: 34ddcecf4445cfbc9fd2a8b3f045bd61c2a35c0849989af780713cb19bcd06db
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting an attempt to leverage these sites for hosting or distributing malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via these links. No scripts were extracted, but the structure and URL analysis point to a link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb51c89b38d---paxosusifisisuvotago.pdf
    • http://kiszelyugyvediiroda.hu/docs/file/fiwunub.pdf
    • https://cleaner.pl/userfiles/file/foboniwex.pdf
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/16093567389cc5---lamunegokavikijowoze.pdf
    • http://hoangle.vn/uploads/userfiles/file/zalefipase.pdf
    • http://tsradviseurs.nl/mailing/images/photo/file/25700815072.pdf
    • https://medicentrumnz.eu/medicentrum/files/file/34293853937.pdf
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/veekjjrfbgbdngbiaadttdmc8m/gekovovazorapuvopixaxapon.pdf
    • http://mp-journal.com/media/file/vujasivo.pdf
    • https://sharadsangam.org/UserFilesTwo/file/pagulejasixo.pdf
    • http://arnold-sitter.com/CKEdit/upload/files/minitobalupenid.pdf
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/28a68pnp0h0jb4d3oloe391jb7/nofivoxusejegokumewib.pdf
    • http://happinessgown.com/upload/users/files/kimalubetad.pdf
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/pk05afusd8qvsbj2bii4hhk7s1/291442125.pdf
    • http://enidbtwcreunion.com/clients/5/52/52e94d62e82ff66504c7d921fc07bf70/File/3471830290.pdf
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/5771f457a78cb34cfccf47b3c0dc87b3/raligisevawo.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/7f6be30f09b955d8fffe52befca6a045/19730461219.pdf
    • https://jamurgoreng.net/contents//files/43631347042.pdf
    • https://bonafideonline.com.ar/wp-content/plugins/super-forms/uploads/php/files/3cace069c37b9c83b2d846e6ee2ce67d/niripi.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/5af684adeda7f5c0cd3decad1b9938f6/figujefuveboxope.pdf
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078b52979540---3417695487.pdf
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d36aceb72df---pufoborebivogara.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=get+in+the+line
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/8b5d841419c4b9debb6318410776b2c5/bukaforu.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_off0000d3b3.bin
695224a3498e5eaf5f36240c8df50e61171bf7c0c78aa248310365473555aecc
pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B3 17072 bytes
font_01_sfnt_off00010000.bin
d1dc67987e9bbf750e84c859f9c839723ec35b55fba8302991cef121403319af
pdf-font-stream PDF embedded font (sfnt) at offset 0x10000 9692 bytes
font_02_sfnt_off000114ef.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x114EF 16792 bytes