Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3454619463dd55c…

MALICIOUS

PDF

81.0 KB Created: 2021-09-03 23:02:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 0bdef338b7cd61752ac7fd02765e1d1e SHA-1: 06ae2021bbe52736c7eb5c54fb4e9d5c3de98974 SHA-256: f3454619463dd55c652fd9d37e5c51030d929400354a140169d0958e2c195f61
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://drafthe.ru/uplcv?utm_term=certified+ethical+hacker+v9+study+guide+pdf PDF link annotation
    • https://zabulgaria.org/userfiles/file/vufurovawudorot.pdfIn PDF document text
    • https://ms01bet.com/contents//files/nixukexatakimukejobaku.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/61272183099.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1621755991.pdfIn PDF document text
    • http://195exim.com/datas/files/29525909085.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/320822e7427c47f1440114ea51cc9240/17569175947.pdfIn PDF document text
    • http://kotolantopeni.cz/file/tasezuxuvijesatubomif.pdfIn PDF document text
    • http://ebus.cn/up_file/file/buxarovidapamijawiroweli.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/160785d67aa2cd---pubatobabu.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/8181bca3bed7d1fa35e07b4d046ac753/ladakiruseluxitu.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/467nhns9bv3ndl6lk5pnq1jk74/vaputofutubukejake.pdfIn PDF document text
    • https://mehreganimaging.ir/images/upload/files/fitorofasonogimemuludat.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/79682001589.pdfIn PDF document text
    • http://georgefamilyreunion.org/clients/86186/File/xizavelanowazapaw.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/5325d2619e4939428a1292940bdd2b85/18715834935.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/588292108.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/72861467563.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/da86aac21fc02f3e9996a62c044b8ea2/popamexubekafori.pdfIn PDF document text
    • http://www.octopus-quatuorvocal.com/ckfinder/userfiles/files/vedufagewutivelazukexux.pdfIn PDF document text
    • http://alliusie.com/userfiles/file/bajiluzabaxuki.pdfIn PDF document text
    • https://nuttydog.hu/ckfinder/userfiles/files/83476758118.pdfIn PDF document text
    • https://uleiuri.ro/userfiles/file/fupututuxozunidoxovufeki.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7ea3f2380b---503681254.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d95d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD95D 11244 bytes
SHA-256: d3900b6fbb37c8ecc8ec47405f04801e9863ad3a28262fe5842c364c86226044
font_01_sfnt_off0000f3c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C0 16460 bytes
SHA-256: 036611de7e210397d7c53510b993f8ae9e46f913b7b139e8fd0d6410f10510c4
font_02_sfnt_off00011e52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E52 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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