Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a3db9a9d702bf8d…

MALICIOUS

PDF

75.6 KB Created: 2021-07-01 09:21:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6dcad0a3338e3d77f2533b69cbc8df57 SHA-1: 8ff44f1b6775049b0798fc6985cb2de4d3254c8f SHA-256: 8a3db9a9d702bf8dd0a24179537b8ab953b3bb9163424921b2035e2c8ded6c2e
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing users to multiple domains, many of which appear to be compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document's structure and numerous external links suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://highlandlynxotic.com/clients/7/73/73cf6ae24f8ea70eb1cbac1dff6b0f9e/File/bixajufeteno.pdf In PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/r7bv4uieo136cp48b6vn8vfnit/mofusipuxamorusumubefap.pdfIn PDF document text
    • http://optikametuje.cz/userfiles/file/begazaf.pdfIn PDF document text
    • https://psystat.net/candyticket/uploads/page_images/files/pagobasi.pdfIn PDF document text
    • https://franchise-vietnam.com/app/webroot/img/files/fosor.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/13825186430.pdfIn PDF document text
    • https://langumeistras.lt/i/File/57567136400.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/9a6f59bb4ee2ea40d9734b17e6c84a78/38347379231.pdfIn PDF document text
    • http://bioterapiazabiegi.pl/obrazy/file/70667637431.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c904c792b87---rulazixiwimimejaw.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/b7e5e513371d8f45039b7a0c767c6544/jirososozusok.pdfIn PDF document text
    • https://nabsangram.com/userfiles/file/75918788630.pdfIn PDF document text
    • http://holidayservicemarsala.it/userfiles/files/sepugozinupodepuji.pdfIn PDF document text
    • https://slide-bearing.com/d/files/1257811064.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ceb98ecf692---45581623574.pdfIn PDF document text
    • https://airbays.com/userfiles/file/dasiviboga.pdfIn PDF document text
    • http://jucal.es/images/file/pumoxelekopikisozawebemo.pdfIn PDF document text
    • https://salubrismd.com/wp-content/plugins/super-forms/uploads/php/files/6f391d424048618c35e4a720d1d6a0df/54388590963.pdfIn PDF document text
    • http://fishtech.org/uploads/userfiles/file/file/dozeneranatok.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/fejimokubowalosu.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/f244a92278e6a08401c81094e76c387d/74605052537.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/0b8ff2c77ae982a08025d8336d003122/sutubosiz.pdfIn PDF document text
    • https://krassimirtaskov.com/userfiles/files/75230354253.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dab4ff13c42---46487386210.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=guess+the+brand+answers+level+7PDF 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_off0000c56b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC56B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dd82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD82 10612 bytes
SHA-256: 677db05dbbef9ddf394bee9c45845b712c8f02e3179fdbad6cb62b1168f9079d
font_02_sfnt_off0000f5da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DA 16864 bytes
SHA-256: 040cfd82321aa01a8b576fe8b161e2c98154fdc6950c771604def0a426ca2a3a

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