Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8229efd6bcebc28…

MALICIOUS

PDF

71.9 KB Created: 2021-07-14 04:37:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d09e9f1d5cb89eadee3eb5f7143685f8 SHA-1: d6435183ab0ad7af770301246f44f339a4ba6a3a SHA-256: a8229efd6bcebc2807df665f4e47acdb0a734b8814fd7b18a7f57e2a7ce05bed
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other domains. These links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://gistfamilyreunion.com/clients/8/8c/8cbf0a40baaab9dd4734ff2cdbb1e120/File/napebetezopop.pdf
    • http://hemeringen.de/ckeditor_ablage/userfiles/files/kegujazuvewevaximosabube.pdf
    • https://deitratech.com/userfiles/file/20754264324.pdf
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/d6k3es9gj7tqq3f7dgvdqogtqb/duxeguxonidef.pdf
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/tj490mmv3jp0kq8s2l5u407rl5/57592371813.pdf
    • https://jamuiboe.com/webroot/upload_media/safupevasaxegedokamobozi.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607533a5a41f1---55293399911.pdf
    • https://sonarmusic.hu/up_image/file/21517625949.pdf
    • http://sochisushi.nl/survey/userfiles/files/zerukofovolejasagawunem.pdf
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0527f1151---82630568836.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/n2sj1amofafel7mo6adnfcdim6/tilikexuvibe.pdf
    • http://dgjst.com/upfile/file/35424276527.pdf
    • http://shepardfarm.com/clients/877021/File/dipigatadorimebifiguz.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a2bce75f2a8---26298922528.pdf
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/lmehrhronc23klnelfj9eipm04/1444504266.pdf
    • https://mvpartners.be/images/uploadedimages/file/kejoku.pdf
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074cf42420de---44892913867.pdf
    • http://ekolojikweb.net/upld/userfiles/file/waxagukiv.pdf
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160844acec4c44---54239688273.pdf
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/imch5bjcnkhk9pp792vhnuu50c/nategatilemer.pdf
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/520f8ad723944e84b690da9753b71ccc/46634189116.pdf
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160970a1a07d55---65031722384.pdf
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/mt53fkbklijkl8ha3h1lhmn415/xugobakiwowedun.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=r+and+r+car+sales
    • 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_off0000b9f5.bin
09ecc1b210b172afb3dc4b28553e9028f104d1f4124f0e104bd4dc7c9ff6d621
pdf-font-stream PDF embedded font (sfnt) at offset 0xB9F5 16004 bytes
font_01_sfnt_off0000e230.bin
8c0f7cfe444478f9a7787d505d2480c3bba89838fdc2590557bf91212f697bd4
pdf-font-stream PDF embedded font (sfnt) at offset 0xE230 10096 bytes
font_02_sfnt_off0000f8ce.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CE 16792 bytes