Malicious PDF — malware analysis report

Static analysis result for SHA-256 197815dfadc3eb6d…

MALICIOUS

PDF

109.4 KB Created: 2021-08-18 04:04:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 90e7770e19e318e972e2ab753757bfc3 SHA-1: 32b456c92c0db2169dcf74f8172a00ab48f22605 SHA-256: 197815dfadc3eb6dae59061b0b4e1a148cf3e28dbcead5134a339a5dce8be413
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to potentially compromised WordPress sites, suggesting a link farm designed to trick users into downloading further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the presence of embedded URIs and the overall structure point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/16073ed5ba44a8---80638309777.pdf
    • https://virtrade.gr/userfiles_lybo/file/zesagoxelikosorol.pdf
    • http://www.tomasjelinek.com/img/pub/file/94651088133.pdf
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/g9j2ptghs5ul2qb953j721l7k6/jolugezomuvi.pdf
    • http://saxonsaxtonfamilyreunion.com/clients/f/f6/f6d0431f970e0833b0867c311dafb132/File/63801895140.pdf
    • http://prestizhstroycompany.ru/SITE/files/editor/file/gifotikozaxitup.pdf
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d0131200076---molelonid.pdf
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/c012cadf9bb91898376f32d590eafcbc/totufodel.pdf
    • https://egf.tw/test2/images/file/rujopalaxu.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f08d0dd1c8a---77346096571.pdf
    • https://blsautomation.com/ckfinder/userfiles/files/91403308615.pdf
    • https://agrimal.pl/userfiles/file/29777289591.pdf
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bf79d0280db---91480944027.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607425831ed39---xixoluzerewipixexopifap.pdf
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/dpi74ien27e5bm4fqhrp15hg5f/toxiv.pdf
    • http://arqing.es/ckfinder/userfiles/files/tadokuwabalabigikonazamor.pdf
    • http://quaretti.it/userfiles/files/pifomiwa.pdf
    • http://www.look4job.gr/images/_user_na/file/medixakewibafi.pdf
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/d74530f2ab10d4695dccaab24f779b33/87378708318.pdf
    • http://atthaya.com/file_media/file_image/file/xisubuwetudo.pdf
    • https://zold-kommando.hu/files/27613229330.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160a64786ec2d8---pusegosubikururepazazini.pdf
    • http://tiendanatacion.com/noticias/files/61253571564.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=twilight+part+1+full+movie+in+hindi+download+720p
    • 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_off0001411c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1411C 16792 bytes
font_01_sfnt_off00015933.bin
64dfb9fde8fee0250516b27b17c30d8c0095042c11ccdd20485975f45711bff8
pdf-font-stream PDF embedded font (sfnt) at offset 0x15933 11336 bytes
font_02_sfnt_off000173a6.bin
e78f92ce3d01e5661211d838a4b787998bc28be927936b7e7f88fa273ca8c5f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x173A6 19160 bytes