Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d0c734078fa4226…

MALICIOUS

PDF

73.1 KB Created: 2021-09-07 20:24:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 737a25524f5c4a2a592520ac672b5bc0 SHA-1: 0e3ca033f0284cd48c7f5816208cbabeda9aab68 SHA-256: 9d0c734078fa422662b87b9488505ba06aa0074693f783bc8e7458dc6752e2fa
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting. The primary purpose appears to be directing users to external resources, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://garglob.ru/uplcv?utm_term=litiasis+renal+pdf+manejo PDF link annotation
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/38b2c2e4889e07b01294c376fc6987e4/takupegomitexukevolabotu.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098b4aa5cdb4---resewemikexadoxafapu.pdfIn PDF document text
    • http://rochesteradams75.com/clients/7/77/774a1ed2e17b5a3c8fe4214cc08eab78/File/60451401300.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/26gn1ec5vlj55jvt8l9615vr6q/6623676065.pdfIn PDF document text
    • http://galluccifaibano.com/userfiles/file/xupuge.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/vdpmbkdb8v91d3l092c8g9tm4s/92412783007.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160abea3a09bdf---86682536889.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/ebbf3c41e32aee9741d2b28b4375c016/visukofizurupewenezoraf.pdfIn PDF document text
    • https://www.letspassdriving.co.uk/wp-content/plugins/super-forms/uploads/php/files/dbvkt4p263mj982kaiukmi7all/popiminizibavudosanepe.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608b049d18177---dutaxokezopiribitidisujop.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a00a139a993---52575213037.pdfIn PDF document text
    • http://landmanenterprises.com/clients/6/66/660ad4be7ac834282af30b44844c6003/File/jibat.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b16c0912c5f---37402674694.pdfIn PDF document text
    • http://painttechvina.com/webroot/img/files/nujobesikolatet.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a022256751---26342159524.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/c1e487da2ddf7d7fd045278e5bdd63e0/zunokaden.pdfIn PDF document text
    • http://psychoterapia-przemysl.net/img/userfiles/file/84298662333.pdfIn PDF document text
    • http://grupopiscis.com/upload/files/pudevujefisowituxogaxep.pdfIn PDF document text
    • http://swaminarayangm.org/userfiles/file/kumamitejufemax.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16075783b6685c---worepegazatewuliluvazixa.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_off0000bb60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB60 10744 bytes
SHA-256: 24b4cb4ba83be149b657cc35bbcfc6ba1375714e3550a0becd8362beb9bdc8a3
font_01_sfnt_off0000d3fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3FD 16420 bytes
SHA-256: 1ea3631dcb71e1070723e8313d39e2aaca5674a8ac2aa68f5c78948a45386459
font_02_sfnt_off0000fd8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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