Malicious PDF — malware analysis report

Static analysis result for SHA-256 dea76df25db3e155…

MALICIOUS

PDF

88.1 KB Created: 2021-07-06 17:18:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5e08232a5513b4c690250fc1ab2c2dca SHA-1: 0d16a2e635280164120146a8d7a0f85ff084333f SHA-256: dea76df25db3e15555ebbeef8cd3d4195505f01b102dcbfdb6f9e878b6b1c72f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting. These links likely lead to phishing pages or further malware downloads, consistent with a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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 https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609241f18e1aa---11389740883.pdf In PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093f3bb63eb6---61449606901.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160819a627a8c8---nubebirifubepel.pdfIn PDF document text
    • http://engroupe.ca/aym_image/files/folivapekukonufavizok.pdfIn PDF document text
    • http://nano-vip.com/ckfinder/userfiles/files/xalizex.pdfIn PDF document text
    • http://lbhs1965.com/clients/6/6b/6bdd8f708684a1f547efbf97e1630fe5/File/fumara.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/508edcd9799bd49530413f325069768d/koduvotosad.pdfIn PDF document text
    • http://studioingegneriavaragnolo.com/userfiles/files/21068033107.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a179b819b84---66613962313.pdfIn PDF document text
    • https://espiber.cl/images/uploadedimages/file/34443113286.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/s5kepmhr6e8is830frblr3kbnn/ridaf.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/529055jepm5f9nnrj5hvahvgim/vuzofufejafo.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/3f16cef2df3a2ee4bb6e968a2c97193b/98445978794.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/f6cd4b84ee84dc8c51566fadfd3fd4e3/21265302849.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/be996ppl70nj48qtjcai7b46l8/fasiposatetanigigef.pdfIn PDF document text
    • https://mimpi1pusat.com/contents//files/dimuvexivadurerofufobali.pdfIn PDF document text
    • https://reparationmobile.net/userfiles/file/fimepadevabudoxufijol.pdfIn PDF document text
    • http://daiichihr.com/uploads/news_file/sejoxefamefo.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c91943d0327---56247037692.pdfIn PDF document text
    • http://xedaptap.net/userfiles/file/44405531398.pdfIn PDF document text
    • https://mebelihome.ru/upload_picture/lajulidamopimokiwisenarom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=first+things+first+pdf+downloadPDF 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_off0000f5b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B8 10708 bytes
SHA-256: 5f9a15d460b292503d947e863edddded2a5a6517050125af665e956c65d8bc1e
font_01_sfnt_off00010e03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E03 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12615 17236 bytes
SHA-256: 2790517024ba7cab891d92a677d8d4ccdf04b729fc11833451acef7f24063f1d

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