Malicious PDF — malware analysis report

Static analysis result for SHA-256 10124fd6d0ddaacf…

MALICIOUS

PDF

108.3 KB Created: 2021-06-26 02:42:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 84c20432155904d5aaecb5a971dcdd14 SHA-1: 6e69982ebaae9e1db969824c8a9b89f5b262d594 SHA-256: 10124fd6d0ddaacf48fded3119c91df03fc944a4bb9b31bc8dc169502339085e
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm. Multiple heuristics indicate the PDF contains numerous links pointing to websites, many of which appear to be hosted on compromised WordPress installations. The embedded URLs are likely intended to lead users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/k02buhf8hkjg7f62jfaktk2pj3/85360573637.pdf
    • https://mk-sito.it/uploads/file/43738651845.pdf
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/add6426fd50f6920bc21740989a26f43/22934581117.pdf
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160825c3228ed9---63087895333.pdf
    • http://short-story.ru/upload/file/mudadutuwusago.pdf
    • https://mimpiindah1.com/contents//files/26596479069.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a03262c7524---59787472450.pdf
    • https://semineebrasov.ro/printuri-fi/files/92906490227.pdf
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c0038ee2a3d---66304679782.pdf
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c1e209c7cd6---kupilolifowiparorez.pdf
    • http://www.alex-vasilkov.ru/images/wisdom/file/sisebuloloduzugesemafiw.pdf
    • https://musikkursus.dk/userfiles/file/fufepabanogefabusuzaziveg.pdf
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afa62486da9---22816725272.pdf
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/1b24b642dfb9329577c8972f48e8d7b2/86131431523.pdf
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160774ddb853c9---64450977820.pdf
    • https://hometeamcorp.com/images/usr/zamofewurixifuxakimuw.pdf
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/e4f1e8880c46abe507335dd609c22151/304128558.pdf
    • http://penzionklara.cz/userfiles/file/rugufufabinet.pdf
    • https://cardion.dk/gfx/fckimages/file/gujimivomesewadipafidaz.pdf
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d8458cde0---gamajilor.pdf
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf7440db99---kuzirakojagit.pdf
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ae65200db0---88583271199.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d334ace4a---zowonekupajajita.pdf
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/3519af023ff1e6f87898a3639f7cf7ae/44128190989.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607847d7e5744---zowulujufiloroxagexerolu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=gonorrhea+disease+is+caused+by
    • 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_off000144f9.bin
967a18b11339b6c6cd27a1c032dbd17fdf85869ca14374ca9f715dfa25ee2d8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x144F9 18280 bytes
font_01_sfnt_off0001746c.bin
890b4b5825dcd3d7008baf6053f7d5503c5f12f3b2e31966e596c34fcf5f550f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1746C 10716 bytes
font_02_sfnt_off00018cf2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18CF2 16792 bytes

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