Malicious PDF — malware analysis report

Static analysis result for SHA-256 07567b802095c71a…

MALICIOUS

PDF

91.3 KB Created: 2021-06-28 00:38:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2e0a80f592092f489121cbf0300a2301 SHA-1: c68c7510d9808292892398df390f583a52082c49 SHA-256: 07567b802095c71af2e5ff400fcfa7d308a21085c55124a61faddd32d19a9ecb
156 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to numerous external URLs, many of which are hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable binary data.

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://the-bom.kr/upfile/files/8268466065.pdf
    • http://sbs-group.co/userfiles/files/zimamowuloluxikefuwogupaz.pdf
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c9636d019---sopogifolopapafikalenub.pdf
    • http://lesen-und-schenken.de/userfiles/files/xifelade.pdf
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d3678d0dfc0---36822549572.pdf
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbcbf8bbfb4---wuxopezuxelilotogusaboxaf.pdf
    • http://vaness-sens.fr/ckfinder/userfiles/files/zagukapiwelam.pdf
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/36d1147d45b3b2a44e5e8b26a544b862/99425399488.pdf
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef62e74eac---41649880260.pdf
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a94505c7de8---42838347679.pdf
    • https://ndmoyun.com/calisma2/files/uploads/vixisefojalezo.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d5c2a5eb852---43066730336.pdf
    • http://www.odnpoznan.pl/fotki/file/file/neniturikifapaximurar.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095186e084ee---42357062813.pdf
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160812b525b9b1---salilurafubegaxuvotowa.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ed9c0919a---regidadekotakeri.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070477362be4---39900440334.pdf
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/8004ffdad32b1a0adbb08f7d8041860f/63568525300.pdf
    • http://zonwering-nederland.com/ckfinder/userfiles/files/saduvajitaxu.pdf
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bf2f41682bd---62790489418.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160997daba1f27---deweso.pdf
    • http://myconnect-thailand.com/image/upload/File/pisirariruxuduguditotipeg.pdf
    • https://watfordfairtrade.org/app/webroot/img/files/90846100435.pdf
    • https://oversaslogistica.it/file/6393693566.pdf
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc02f334ef2---tixemepus.pdf
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160738f0d4c399---19234591377.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=natural+and+artificial+methods+of+contraception
    • 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_off0000ff55.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF55 16792 bytes
font_01_sfnt_off00011767.bin
71ec80e6ac19ab902d224ee09bca68817f2a49be0207154d57a27a9026a33469		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11767 17708 bytes
font_02_sfnt_off000145f7.bin
a7b2155b659fd37b2b2c3f20c2821551a14080fcab492304f4a1eb03c3400928		 pdf-font-stream PDF embedded font (sfnt) at offset 0x145F7 10960 bytes

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