Malicious PDF — malware analysis report

Static analysis result for SHA-256 be2db583c944edae…

MALICIOUS

PDF

81.8 KB Created: 2021-09-04 09:18:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3670325ca9dd6b229cfa11ba841232d0 SHA-1: 0929be7e968201b0aced5e7f4a85f7a0a09e7d0a SHA-256: be2db583c944edae040d104e368d26c2a67277ac45fb88c75a7de93f6e7bc5a5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. ClamAV detection and ML classification strongly suggest malicious intent, likely for phishing or malware distribution. The presence of external URIs and link farms points towards an attempt to host or distribute malicious payloads via compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4beab7a426---44702504902.pdf
    • http://cogersquest.com/clients/f/f6/f6194b381802d71b6842d6160e8859b1/File/zekapovexipologuxajebif.pdf
    • https://dadesigning.com/daduserfiles/files/4819797193.pdf
    • https://stmarys-perthamboy.com/upload/File/nipip.pdf
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a2083a0d641---bulizodijigafukewusumemil.pdf
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ec424b4b80c---xinezak.pdf
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079ef8d89cf1---82194232500.pdf
    • http://jfhconsultancy.nl/userfiles/files/15613329484.pdf
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/0512259dce180c59694b341026c98621/27912312222.pdf
    • http://alnoorcity.com/userfiles/file/pezolilujupupojizuk.pdf
    • http://drironcat.com/images/file/zenorudedobegonaluv.pdf
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/0eo4tlspf1gfc1vnom6pj9m83b/bonewepozafovexefabevilur.pdf
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ecfd3e2df6---bebedodufibi.pdf
    • http://1hozain.ru/files/userfiles/files/90414463973.pdf
    • http://rc-modeller.se/images/file///7490879619.pdf
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/16073b2aea2647---84121816740.pdf
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160bbb63152f43---piwira.pdf
    • https://thegioibaobicarton.com/Images_upload/files/rebulazamerepolesofufale.pdf
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/d83d7de8c4a1c47b42ac45b51a5810e6/xirak.pdf
    • http://saaretravel.ee/images/file/17477192261.pdf
    • http://ccswcd.com/userfiles/file/21185606213.pdf
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/xolepozerubijezove.pdf
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160b940d099265---72720705716.pdf
    • http://aajude.pt/backoffice/ckfinder/userfiles/files/22724435691.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=causative+verb+pdf+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d43a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD43A 16792 bytes
font_01_sfnt_off0000ec4c.bin
cf5408d6c2d6a36927aa7cc702db1d6e345a83dbbf67b7ce16adbc50581c1715
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4C 20136 bytes
font_02_sfnt_off0001207e.bin
44367aa4bb5d5270dffe4468dbe3e93c1630178be34f8c97a3998e5def7d9c89
pdf-font-stream PDF embedded font (sfnt) at offset 0x1207E 10912 bytes