Malicious PDF — malware analysis report

Static analysis result for SHA-256 022e19a80327bcf2…

MALICIOUS

PDF

89.0 KB Created: 2021-07-28 05:05:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7c78e484da97d431c36e8b5ef25aa308 SHA-1: 8fd8de1cec4b87d8b1033ac9116f8780ed64aa8a SHA-256: 022e19a80327bcf28af86debb359f4de76688d76395d87a125338f100f707771
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The 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, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users. While no scripts were explicitly extracted, the nature of the links and the detection suggest it's intended to lead users to malicious sites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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 http://danfilenemd.com/clients/67744/File/puvofigibivamopipu.pdf In PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/u6qaen5rhcugnnlqj4kb11o75p/supagesubasokifid.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e132d3a486---nemakugadajexuvinima.pdfIn PDF document text
    • http://yesilderecine.com/admin/editor_resim/file/93829914138.pdfIn PDF document text
    • http://harmonie-avion.fr/actualite/files/sezilirojaf.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/g8r33qrjpvs2tqk0g1mou2vf4n/fazowixejinizevad.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/fotutudobiva.pdfIn PDF document text
    • http://kondicionery-domodedovo.ru/upload_picture/file/vipuworof.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160adaa672ee9f---1469195776.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16078d0c486560---2717094851.pdfIn PDF document text
    • http://impressivetravelvietnam.com/upload/files/60117061446.pdfIn PDF document text
    • http://khunghinhdepphuctin.com/media/ftp/file/kisimuzutoridagalataf.pdfIn PDF document text
    • http://caycanhtuyhien.com/uploads/image/files/larumulapawarofixibidini.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/977fa42154944bcd76330da3dcffad07/5777042453.pdfIn PDF document text
    • http://compufoxmail.com/userfiles/file/wupiluwirurisekisazo.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/d2bf8a13698cb2d2377f603ba9eb44bb/30681502727.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/zavorisosuwobuzarinekoj.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/ae76448a5f37d5f1769f1ebbddc4a9d4/15567674616.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/o1rldcj7ffe7s0dr1mji1r8t37/juwozofarugetedu.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/22124ebba795b4768fff0da0a173a1af/kubiworulorogatije.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/b131bf84733e80bcab5c628f41213dc3/80547440362.pdfIn PDF document text
    • http://garderoba.sk/images/_file/xofebitimupefi.pdfIn PDF document text
    • http://izdepskifamily.com/clients/1/1a/1adacdf247316bc4617b3617d965acc7/File/38888921330.pdfIn PDF document text
    • https://thic.muki001.com/plugin/ce1/ckfinder/userfiles/files/fefuliv.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e5bf6f2d4---jerugukekekapili.pdfIn PDF document text
    • http://fulepmark.hu/nyebu/fulepmark/userfiles/file/zomigemisafiditox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=pokemon+alpha+sapphire+extreme+randomizer+nuzlocke+poketipsPDF 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_off0000f4d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D4 17736 bytes
SHA-256: d980323001ec8b5b135f93aeff477b38fd9b42760e69a8c169fed2fdcfd6ce3a
font_01_sfnt_off00012331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12331 11132 bytes
SHA-256: 173bafd23e4be50b6788e07f2a68a4d14c1b3cd03e44383914ddd879b4606305
font_02_sfnt_off00013d0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D0D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1