Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a242f401c65dd8d…

MALICIOUS

PDF

92.0 KB Created: 2021-08-11 08:50:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e5976c5edeb5a4d16385259c736b3d66 SHA-1: 0e880e214716072a8268b6a6073fa73c842f16ba SHA-256: 5a242f401c65dd8d2817883255e9e5b9ca5f74f44d6faed33b363b2f0afa28c2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous embedded URLs pointing to external sites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm or phishing lure. The primary purpose appears to be redirecting users to potentially malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://allytemp.ru/uplcv?utm_term=driver+booster+7.4+key+lifetime PDF link annotation
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160af6bbe510b7---94950011371.pdfIn PDF document text
    • http://bulongvungtau.com/media/ftp/file/34823048363.pdfIn PDF document text
    • https://benqmusicworkshop.com/fupload/file/todutawedowig.pdfIn PDF document text
    • https://aspaeng.com/files/image/files/jusopu.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/e135bce13416eeb5e720d9eeb9a8602d/35531898833.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/73580571f497bda2ccc96b99c3f2977c/86155149804.pdfIn PDF document text
    • https://ceccarbotosani.ro/userfiles/file/figivoz.pdfIn PDF document text
    • https://locoffice.ru/userfiles/file/47398873744.pdfIn PDF document text
    • http://nemdanangpho.com/uploads/2021-05-28/images/files/86159950806.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a038c91b68c---13900666738.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/e63b3f762ce95f480bf2062748c7e792/pugus.pdfIn PDF document text
    • https://commonwealthsportsawards.com/userfiles/file/kutavasaretimobofulepaja.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/88267485727.pdfIn PDF document text
    • https://mayurherbal.com/userfiles/file/45035349580.pdfIn PDF document text
    • http://buzmakov-ua.ru/admin/ckfinder/userfiles/files/mafezojodakiboxudokoxisar.pdfIn PDF document text
    • http://rokakisreunion.com/clients/a/a8/a85ca1e4cfc2bb88d767af442173b437/File/ladubozokodilesufidonetez.pdfIn PDF document text
    • https://kompaspt2.com/contents//files/xopusefofifugemetaparo.pdfIn PDF document text
    • http://gatewayhotelbangkok.com/upfile_hotel/files/mufofogamopurigamol.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e3c93b84e7b---19243387859.pdfIn PDF document text
    • http://muszempilla.com/files/file/85561726880.pdfIn PDF document text
    • http://wych123.com/upload/files/runewuwanurinakakowil.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_off00010083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10083 10716 bytes
SHA-256: acae22c3ab43be68211d030025491fa82cf2e304e9ba024e7da70b8be6c3ebe6
font_01_sfnt_off0001194c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1194C 17804 bytes
SHA-256: 5dd2a274fc75beea10c7cd7bd6f49023af3b3ff1676a696cc33101fdf02db2c3
font_02_sfnt_off00014854.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14854 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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