Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0d689ef30b3e0bc…

MALICIOUS

PDF

92.4 KB Created: 2021-06-29 23:33:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2fc511713a46bfd25ed119bf3401d703 SHA-1: af9d198e0b8dd983cdcc2d4c6b5a923275b2f745 SHA-256: c0d689ef30b3e0bcc0bb68e36ac3d691d69f29f21480362f69b6d2605128b496
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised websites or domains associated with link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

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://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/711de2f3d844752c90f1aaabb436ea82/safunupixemobajuwovoku.pdf
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b105d0ce686---pajotuvidupoludemuli.pdf
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/cd9e5f3c9795bc3acbd564ed26e80a73/61392160859.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/16072188468e57---vetizapubib.pdf
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/qfr07nubembet78o575l4t441r/lubomejimetuvixekibiviri.pdf
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/5fd56187dfe0ff83278e0ba5b78f28f3/garesakejujipojabowe.pdf
    • https://aduanaldelvalle.com/userfiles/file/18093878070.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/nt997o5vuaue6l6r8n06nspnkr/99747846535.pdf
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092e4cf6e970---dakidesijobixamanixaxidab.pdf
    • http://xn--2-140-swe8h.xn--p1ai/files/80542706006.pdf
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/d116d4481f40267d453a2e75d225adcf/58017473991.pdf
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be7cf5518b3---44676489979.pdf
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a4652e5cf3d---kevijokibugudirumasejoxim.pdf
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160918cc173df4---nadetufabonebokanimiro.pdf
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/2c7e42bf1a675a2008b7a5ddd6af2044/75735961734.pdf
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/65f1be3ae33270f25432be3e32c7485a/dukodup.pdf
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/gmcbaaemj4h8j778l6n7g4lkmq/89225696564.pdf
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/nn6qo6f0a70ddl56vjc9kjgt6m/filuxogewok.pdf
    • http://ligonfamilyreunion.org/clients/9/9a/9a44987365eba454cd9b2deda39aa7c0/File/vuduga.pdf
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/7f4llhde84dl9drpoh00binh0d/luxevifunotegibabotovo.pdf
    • http://100gastro.cz/soubory/files/38350971655.pdf
    • http://learningkey.org/userfiles/fapudinux.pdf
    • http://rockhousemethod.com/ckfinder/userfiles/files/bibatixoxutiwixubikaze.pdf
    • http://deltastal.ru/userfiles/file/35447067854.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b6d66aaded9---45196606742.pdf
    • http://applexin.com/ttpsea/files/file/kukavatixilazowoxolarebe.pdf
    • http://yulintimber.cn/d/files/52473202038.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=health+and+sickness+worksheets+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_off00010448.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10448 16792 bytes
font_01_sfnt_off00011c5a.bin
0cac05376ac101f9dece3caa07d9d2c98583c5e89626b6c45c790126a88eb5a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C5A 17040 bytes
font_02_sfnt_off000148f8.bin
a87a551fc6bf653c768aeb396fad7a831252f1d254a8e3d8c248b2f407472cb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x148F8 10884 bytes

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