Malicious PDF — malware analysis report

Static analysis result for SHA-256 f42866ac4318363a…

MALICIOUS

PDF

81.1 KB Created: 2021-06-29 05:13:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: ad0cbb54266b8a0dae82861f72b21d80 SHA-1: 4ae6785bbf72bbdca91d64c0a9f10c9b09f2ae80 SHA-256: f42866ac4318363a708ed4dc94f90cfa4e54517e7dc871b5b2617378afc97016
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains numerous links, many pointing to compromised WordPress sites, which likely serve as a lure to download further malicious content. The presence of external URIs and link farms suggests an attempt to redirect users to malicious sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160815c3397c02---3909976658.pdf In PDF document text
    • http://timandlor.com/userfiles/file/61599602955.pdfIn PDF document text
    • http://arch-teh.com/pic/userfile/15442022814.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160cefb011753f---96072084604.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/deef1523f324afe9ec5d290f5f21fb15/90904600888.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160854b142b13f---zonorixunofapuvumibowug.pdfIn PDF document text
    • https://egokituz.eus/files/galeria/files/giduxufirelodadawot.pdfIn PDF document text
    • https://gbagencement.fr/uploads/file/32679331183.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608d205fcb169---xurizufomafejowaxidazo.pdfIn PDF document text
    • https://taevlingar.se/images/pages/file/9441849130.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dad04e6f5a---83311133880.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da494377053---xekes.pdfIn PDF document text
    • https://matrainagycsalados.hu/userfiles/file/xajetovenopawejonuw.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/jezowoberetopapoliv.pdfIn PDF document text
    • http://gerd-pollak.de/userfiles/file/zonolexivimumiwiju.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/629cc3f86755aa5edfb3ec4caee31472/jedumob.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/mopijedus.pdfIn PDF document text
    • http://adams-gold.ru/archive/image/file/rokesenoluxed.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/rinuwadoradixijanef.pdfIn PDF document text
    • http://criollo-cocoa.com/userfiles/file/80327012777.pdfIn PDF document text
    • http://lucidarepavimentimarmogenovaealessandria.it/userfiles/files/71876150388.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/f99bd76311663f5898b98d47ef9b32ba/guzifujidukobadepojotud.pdfIn PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/8987883909.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070d50d2194a---binulonezibon.pdfIn PDF document text
    • http://derkwoo.com/upload/editor/files/87199035584.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/5dc75e55fa0b4160229a0245b216b937/bosewosizipawimep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=soft+and+soothing+musicPDF 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_off0000dac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC7 10820 bytes
SHA-256: c20265f9d26c97a62e1a154958b402d037c1a882a5b74b0d5cad2458104f72a2
font_01_sfnt_off0000f350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF350 16688 bytes
SHA-256: e8432da4a0359266e25c39fa5dd14ed867e5695317a44c0be7faddb7ca3aeece
font_02_sfnt_off00011eed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1