Malicious PDF — malware analysis report

Static analysis result for SHA-256 06e9704add67c965…

MALICIOUS

PDF

83.4 KB Created: 2021-09-01 18:22:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7624f764c303ffcebd993f90d953555a SHA-1: 74d3883d2862d1f10c6b6336572c8dffbdb80c52 SHA-256: 06e9704add67c9659776cf742f1168f0fd1be47f2bf5551d1464d6df6f17624c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links to external websites, many of which appear to be part of a link farm hosted on disposable or compromised domains, suggesting a phishing or credential harvesting campaign. The embedded URLs are designed to lure users into downloading further malicious content or visiting phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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 https://krisoc.ru/uplcv?utm_term=sysadmin+resume+example PDF link annotation
    • http://polyalpan.hu/_user/file/7040715785.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/99795613658.pdfIn PDF document text
    • https://tailormade-sales-marketing.com/userfiles/file/8138253184.pdfIn PDF document text
    • http://wwsm-us.com/files/file/28314179558.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/c9f9496940aec9ac112919d44d3a2188/vujimelur.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1608f41f2d5181---zuxolomawizemamiwozaki.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/pusefuzelirudutinugemi.pdfIn PDF document text
    • http://3e-recycling.ru/app/webroot/filesfiles/wugolotapevag.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a7cc612a9fe---29145259501.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/48jhn5moaedcquk2dp1ih9v0c3/26698178640.pdfIn PDF document text
    • https://centrorevisionimonregalese.it/file/tapod.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/4181032430.pdfIn PDF document text
    • https://penzion-palice.cz/content/79614916990.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/68182575235.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/lah0us9hmc37pllegaot7jv436/10067090334.pdfIn PDF document text
    • http://crystal-lamp.ru/uploads/files/jivobadugowetatixesa.pdfIn PDF document text
    • http://7166867.ru/ckfinder/userfiles/files/32246250863.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/589a89a3518a5e08e8c88e2108be0b32/53906528137.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c4ac15a8442---wikoxavisamufoxuwutisog.pdfIn PDF document text
    • http://www.agenbenangbandung.net/file/xabiwipinemefaxebusixefe.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4a0f292af5---pozomozixinofox.pdfIn PDF document text
    • http://mya1fc.com/files/ckuploads/files/gawaxixup.pdfIn PDF document text
    • https://etonbio.com/newsLetters/images/file/vopipibotabanapozol.pdfIn PDF document text
    • http://atomicattack.com/atomic/fckimages/file/75395490501.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16071353db8990---somexeretosobumuxu.pdfIn PDF document text
    • http://farmina.ru/uploads/files/4360052786.pdfIn PDF document text
    • http://dietaltop.com/userfiles/files/70397978787.pdfIn PDF document text
    • 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_off0000e0bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BD 18064 bytes
SHA-256: da797aaafcd08380ca93bcf3af6e364a3c840cddc3242d940088dda9a508e0a2
font_01_sfnt_off00010f9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F9B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000127b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127B2 10728 bytes
SHA-256: 03d399acaadc31bba55c051d3e3d83ed5ebe574c3ac03cabfb0d019b2e326737

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