Malicious PDF — malware analysis report

Static analysis result for SHA-256 99f8977f22268f92…

MALICIOUS

PDF

90.7 KB Created: 2021-06-27 17:52:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: fb31ae7d7c622f35eafee724039ba0a5 SHA-1: 964c69ba54f6efab70e3fc3a1268cc7ed1f64da3 SHA-256: 99f8977f22268f92a31c46fd6fb0d87efc83da36897a7983d39a6009e8e7c537
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's likely a phishing or malware distribution lure. The document functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting. These links likely serve to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://abril.pe/wp-content/plugins/super-forms/uploads/php/files/6m57dmt0ddnjv11e5ouulmjs66/wirofesop.pdf In PDF document text
    • https://mszukam.pl/dat//file/5260416225.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092547414330---44813025096.pdfIn PDF document text
    • http://tablica-nieruchomosci.pl/uploades/fckeditorfile/gilasasidalupeva.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5aa7fc7b155e786206e0454a7a53ecb8/kabokokezu.pdfIn PDF document text
    • http://hodgesmageefamilyreunion.com/clients/c/c9/c95619ca3ec29dd030dc8935b97378d4/File/widasuxofoni.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160834b65cee19---kolalubanemanamusoxisopi.pdfIn PDF document text
    • https://readandenjoy.ae/userfiles/files/62065185508.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/9a1f3c38d35eee1bb4336362eaea6966/majibewuranavisere.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/oihq11batkvf572vja3l1r9d7o/bokejadepibaxevovovik.pdfIn PDF document text
    • http://foto-klub.dk/userfiles/file/lesomunisokanezi.pdfIn PDF document text
    • http://hintzfamilyreunion.com/clients/1/12/12a2788c5de59b93c87e4eff35998d4f/File/lirozexajoxosorabanolile.pdfIn PDF document text
    • https://gadd-asso.org/userfiles/file/bubulatifetuzimira.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5c2b0bffd---xopowewosixuwofiz.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/e253c566a65b68059a80b525f3192f16/66959624321.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f44f522907---90141619903.pdfIn PDF document text
    • http://darec.sk/files/files/18582879914.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/35300477c66f1dcf75a44919e9c5e502/lakilosadupojufe.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/78f47564fddd3380faeca1b460a6155f/80649225062.pdfIn PDF document text
    • https://atl-50.com/files/file/45589493470.pdfIn PDF document text
    • http://artospace.com/pics/file/duguxorekuwebu.pdfIn PDF document text
    • http://rybarict.cz/webpagebuilder/ckfinder/userfiles/files/xatubapinevumubopaluda.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/niqqnj1qlfhrkndh8kiuqmotu7/zewufev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=different+types+of+sales+closesPDF 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_off0000fe4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4F 17424 bytes
SHA-256: fde6c76e1738a9645882ebeb5305baeeeadd63d0164771f7502853591c3b3d66
font_01_sfnt_off00012ba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BA3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000143ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143BA 10588 bytes
SHA-256: b52bf5bf39cdd4fa11e6b694e209ad953fdbb99752deaf9f18ab5d104fc26bff

Open this report in the interactive analyzer, or submit your own file for analysis.