Malicious PDF — malware analysis report

Static analysis result for SHA-256 867064d9f2f8f27c…

MALICIOUS

PDF

86.9 KB Created: 2021-07-01 09:22:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9e6ef584cf1012e441bd62aa2159271f SHA-1: 32d57be793ba3bfb65f6b033d4f7adc7dde0dd2a SHA-256: 867064d9f2f8f27ce66a06e3939f6cdf8fa7a99f03ebbdc256f9c9538582a2eb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to websites that appear to be compromised CMS uploads or hosted on disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/979fab34c340b200069b6d260ca01402/92797077755.pdf In PDF document text
    • http://carefirstwalkathon.com/clients/8/89/89514deb4c0e8807eb046cac28c4977f/File/77453421578.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d22325d9ec1---18558136297.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16080c98936e62---77220692350.pdfIn PDF document text
    • http://bhs-class1957.com/clients/35434/File/32900774178.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c59cc0d3f47---61057913431.pdfIn PDF document text
    • https://sambelteri.com/contents//files/kinuk.pdfIn PDF document text
    • https://btcauction.vn/hinhanh/file/83252098001.pdfIn PDF document text
    • http://cablexconsulting.com/Upload/file/41658757692.pdfIn PDF document text
    • https://doanhnghiepvietnam.org/img_duhoc/files/85031162595.pdfIn PDF document text
    • http://thedreams.cz/files/29456648998.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609f2481a51f5---91067606654.pdfIn PDF document text
    • https://comfortinnbarrie.com/phpsites/vertical_living/uploads/file/77025450855.pdfIn PDF document text
    • https://fourseasons.events/wp-content/plugins/super-forms/uploads/php/files/1224997b890caee0a3a13a4136785c15/92177774938.pdfIn PDF document text
    • http://twfindia.in/userfiles/files/pejow.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210505203439.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3d7428fbfb---2546880976.pdfIn PDF document text
    • http://applexin.com/ttpsea/files/file/bitevibedabivejomelexaki.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9695c9aa4---18265586820.pdfIn PDF document text
    • https://eurouniversal.eu/ckfinder/userfiles/files/pikevogo.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/rfaetnkf73cnonid8fgmvaorfl/50890208878.pdfIn PDF document text
    • https://textolinguisticsolutions.com/upload/editor/file/59150382439.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c655485023---bomegugoguboxiwen.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/5c95cf250f92efc79b8647600b01b55c/fojuruzikowisoxivok.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160795c84dd1a7---sapujoderiva.pdfIn PDF document text
    • http://nicenpos.com/userData/board/file/42265939940.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=common+second+namesPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF070 17476 bytes
SHA-256: 2ebcd0dbb4aadb240f15bf2ab6cb57d39b77978f2ca73c8feac50b8f8a52038a
font_01_sfnt_off00011e1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E1E 10224 bytes
SHA-256: 25c03b03af8b9e085efbc65bdde27792f817fbb7c7af1a005a2b8365b79f61e9
font_02_sfnt_off0001350f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1350F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1