Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6d0b02f94e51eec…

MALICIOUS

PDF

86.0 KB Created: 2021-06-30 06:55:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d07b2df322f7ef0d43c8616859648545 SHA-1: e08d9f181b28edb014f937a12ebd6f02379c3c32 SHA-256: d6d0b02f94e51eec3b9a0315977fe81381b75eb98dd1f75212cb33bc3082a87f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest 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 delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://oniceh.ru/uplcv?utm_term=become+a+library+assistant
    • http://mextro.de/upload/files/74577485053.pdf
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/e5ab067869274b307ec97d2fd5da9c4c/xurixitulanip.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1ddc4b4029---kuxujuwitinagil.pdf
    • https://hosvagyok.hu/userfiles/file/25333651505.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/44778831686.pdf
    • http://architettoangeli.it/userfiles/files/70874396877.pdf
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/6eefafca539cb0343c784da457cf1885/kixinidulusajevamixoke.pdf
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b429b309660---54456220471.pdf
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608591aea6694---44159871536.pdf
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9bc90bee7---58749538046.pdf
    • https://amatnieks.com/pictures/image/61885354071.pdf
    • http://slsnn.ru/content/file/noladofev.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607a40ee9af53---kefogofubofisinowev.pdf
    • http://frangarcia.eu/upload/file/22106656869.pdf
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/3o4e2htho724omoj45hthju5a7/xeredogupemekisekufijusut.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/6dcd6246253f17a2a4bf893f242045d7/27804558330.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/d6huvimightjmnjqj0n7s692f2/sodiduto.pdf
    • http://futurepoolandspa.com/ckfinder/userfiles/files/giwesuvamanidubememet.pdf
    • http://melinterior.ru/userfiles/files/2033964737.pdf
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608742535cadf---butejaxukomek.pdf
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160741c5f48634---20243937650.pdf
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/q9l758o8kvrs4hno6h0rsunvgi/38881756506.pdf
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/of8pljf7l1mss7700ifsmh8aba/96481967728.pdf
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4383bf0dd4---goxodunid.pdf
    • http://pro.ovh.net/~tribuene/images/banque/file/vekazurebogigarupog.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_off0000ee06.bin
b770acb7bf8821394e125cf0aa42a7387f536f85c8ffe765395cfddd5dfec5cd
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE06 10700 bytes
font_01_sfnt_off0001069d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1069D 16792 bytes
font_02_sfnt_off00011eaf.bin
bd86599a669e13afcbca3e64e24a903616c42b2ad6659859e6c49f4b9baab957
pdf-font-stream PDF embedded font (sfnt) at offset 0x11EAF 16852 bytes