Malicious PDF — malware analysis report

Static analysis result for SHA-256 d074772efc03f0ea…

MALICIOUS

PDF

93.6 KB Created: 2021-09-01 00:33:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2d93adf38528472539b6e381b41bbbc6 SHA-1: 9e9002ae76db3126b3ed42bb55dbe2afe0283e5a SHA-256: d074772efc03f0ea86a82a013b176c83f74c102f21064f6509326b3ee1bbfd0a
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The heuristics indicate it functions as a link farm, directing users to multiple compromised or disposable domains, likely for phishing or SEO abuse. The embedded URLs and the PDF structure suggest an attempt to exploit user trust or search engine algorithms to redirect to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://alnadaoil.com/userfiles/file/52702981519.pdf In PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160732e4ac9db9---xunetunirelujurul.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/btt6684a8djbc757hfci4qlmn6/7207179335.pdfIn PDF document text
    • https://rm-parketi.si/uploads/87852960712.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/9ea4ae6b247e8c53222e57ecd8129356/53981710973.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1608653d392eaf---momezeboguporujonekeregav.pdfIn PDF document text
    • http://geodavidepini.it/userfiles/files/pevuxepuwosudotenuri.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9cf146fd8d---12159724577.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/buleletofiri.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093c2ef8a55e---47765224886.pdfIn PDF document text
    • http://jindi2010.com/uploadfile/files/28800913765.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a4d97aaad1---45620540239.pdfIn PDF document text
    • http://www.ciesol.es/ckfinder/userfiles/files/koxumegunug.pdfIn PDF document text
    • http://angel-conference.org/upload_fck/file/2021-8-12/20210812225806738064.pdfIn PDF document text
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/16805197760.pdfIn PDF document text
    • http://szentimresiklos.hu/upload/file/fudidenuriwamolifaga.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab7abbd71e3---8371290711.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/09af09be7797219fa52f40cf666f0832/zidezotapufabitive.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/nezedumamurep.pdfIn PDF document text
    • https://hanedantoptan.com/upload/files/98868145261.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/c1gjialshs7kmj66vu3unj2s6k/zatutazubigifelikapilo.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e181816d1f---93713514326.pdfIn PDF document text
    • http://danielbushreunion.com/clients/41596/File/rukojinakaderinevuloluz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=suffix+for+honorPDF 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_off000106ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106BA 19948 bytes
SHA-256: 555041055c3141729bf9b1d726e3af4267d7e2109f17947115556d7be735fc57
font_01_sfnt_off00013b1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B1D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015333.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15333 9980 bytes
SHA-256: a5851cafe7da6af817913d329e0018f5dc9e53b7bc2fcfb968b86c8388cfb6b9

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