Malicious PDF — malware analysis report

Static analysis result for SHA-256 42fe9aecc3977dcb…

MALICIOUS

PDF

82.8 KB Created: 2021-09-06 04:32:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 60b1d3aea6101d716cd7440caec4be13 SHA-1: 07960c40b48c04fbe5bc4a492a22561dfa2f629d SHA-256: 42fe9aecc3977dcba46943a3002f9d24559f3d4aab20adb3fce6cbdf9bcb94b8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the URL structure and heuristic firings are sufficient to infer a malicious link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://catamma.ru/uplcv?utm_term=collins+gem+english+dictionary+pdf PDF link annotation
    • http://honda-vo.com/upload/file/bisobasuriwijibu.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608367745ae7e---tebuvi.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/5cb2a0f8bb5ce82a255261d68fb8a540/jelozute.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/d9717d2b507b82fa1ed382e815d91f2b/lavikumorowak.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/9574n4t4ucpu5c8duk92ku8eoo/18265713648.pdfIn PDF document text
    • http://goodfortune.hk/UpLoadFile/file///gezigogimexemivikiwetiwup.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/bnn2vpohs9tsr0eprkrnn49ebu/73939199955.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/6f9cff6393eb02b83fdc90c7f610bfb8/40811066248.pdfIn PDF document text
    • https://iguanapools.com.au/wp-content/plugins/super-forms/uploads/php/files/aupqei8ak0ao41hh1fgv52phu2/gavotubinupa.pdfIn PDF document text
    • http://kiajihlava.cz/UserFiles/File/jukuz.pdfIn PDF document text
    • https://g55net.com/webpagebuilder/ckfinder/userfiles/files/46231108320.pdfIn PDF document text
    • http://gpszone.hu/upload/userfiles/file/gabalunopubeluva.pdfIn PDF document text
    • https://cr2tek.com/userfiles/Proj_Name//files/rotikejuvotidid.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1e28b4f52---xavufolezosadatu.pdfIn PDF document text
    • http://moestuinwebshop.nl/userfiles/file/10539471724.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/e5a514fdad7798843cbd7144cfed2c7c/69210272610.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/t6gqje7p88b3ofisrqlm6i0obt/pubujejibiwagijig.pdfIn PDF document text
    • http://marketingnews.fr/images/file/40697449318.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/8b7afcf74eb2f2a7d2b0215c6c096839/27180310866.pdfIn PDF document text
    • http://klinok-saintp.ru/files/11089138833.pdfIn PDF document text
    • https://bio-obst-und-gemuese.de/userfiles/file/90204721252.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/jkrt4lkbvrsbrkhahciesssffv/60331549077.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_off0000dc37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC37 18304 bytes
SHA-256: 74403e167e942256af6ea936f236ae0d171ee2388d7b1a8598f5d28d588cf2ce
font_01_sfnt_off00010be2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE2 11212 bytes
SHA-256: 0e705156701d4a975e1b095d4682c5b9a492736a2593f10c0815161780ba0c10
font_02_sfnt_off000125c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.