Malicious PDF — malware analysis report

Static analysis result for SHA-256 96b32bc1cffc6ef1…

MALICIOUS

PDF

95.3 KB Created: 2021-07-15 15:38:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f11493d1af5aed8144dbe0ccf1b7f095 SHA-1: 9fac8e4a537992d00b857da2a9bc174ad7eb7616 SHA-256: 96b32bc1cffc6ef1c2ec6b7cafd8a055d369d64da03463ca4699eb8e51500d0f
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file exhibits characteristics of an advance-fee scam, using lures related to lotteries, prizes, and parcel delivery. It contains numerous links to external websites, many of which appear to be hosted on compromised or disposable domains, suggesting an attempt to redirect the user to a malicious payload or phishing site. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://catamma.ru/uplcv?utm_term=proprietary+investment+meaning
    • http://planet-for-events.de/userfiles/file/55502182610.pdf
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a18fd0a23---xusokopovowujabimog.pdf
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/ubnehdpoknpo6556ua01ajbk68/purupitisezagosegamimuw.pdf
    • http://statsale.com/data/upload/ck/files/96132363494.pdf
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f8808319a---37163401854.pdf
    • http://accessprecision.com/userfiles/file/8206032465.pdf
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/buhhrpr6u673d17b9mvseohil4/95894224400.pdf
    • http://vyveva.eu/UserFiles/File/23527801324.pdf
    • https://colakcivi.com/userfiles/file/86957797010.pdf
    • https://artasedanasingaraja.com/uploadfck/file/dajix.pdf
    • https://deesudcoolingtower.com/userfiles/file/baxerejukatojogub.pdf
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160799dfb7b8d4---16680619613.pdf
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/610bb5d260541d1ef96e8e9bac88c1df/79342796397.pdf
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/07b7da64f5d4160346ca444f6be23347/17579552750.pdf
    • http://businessdevelopmentcenter.pl/uploads/userfiles/files/43297861917.pdf
    • http://prinsart.ro/uploads/files/pabapirawe.pdf
    • http://morgancountyoh.com/userimages/2627613138.pdf
    • http://kasystemofkarate.com/clients/861259/File/fufatesomabodexozedafegu.pdf
    • http://afghansolar.com/userfiles/file/99941459886.pdf
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/8176c9b78f375d546f6944bff1b4f651/95654426872.pdf
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff0e76ece6---rejujoro.pdf
    • https://299-45.com/CKEdit/upload/files/19348886844.pdf
    • http://chia4kids.ru/ckfinder/userfiles/files/fakep.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_off00010e5b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5B 16792 bytes
font_01_sfnt_off0001266d.bin
8506a396336ae7546634806c2f962089b43eab51416190001315073181fdf5a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x1266D 18396 bytes
font_02_sfnt_off00015779.bin
c4f3fb4734010c3e68351c0ba0f615978e7d74f3cbb5d2f91db93c2926829327
pdf-font-stream PDF embedded font (sfnt) at offset 0x15779 10732 bytes