Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b701c71bea8413b…

MALICIOUS

PDF

137.9 KB Created: 2021-06-27 07:25:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: a60641d8a43a3c6f20744510319a8168 SHA-1: 0e51b7fc680eb6601af7b15fc8346422a2f1f02b SHA-256: 4b701c71bea8413bbfb1a3ab076c716d3072c4c35e236a9899102e08b7bb8eed
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm to distribute malicious content or conduct phishing attacks. The embedded URLs are designed to lure users to external, potentially harmful, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://crewmak.ru/uplcv?utm_term=the+purpose+of+ash+wednesday PDF link annotation
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/id72q7mjmrrbfnsfac2ke80hhv/sajalejanituwozimana.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b31c918854---51185526880.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16079bf65edf87---94530386426.pdfIn PDF document text
    • http://shosholoza.de/file/rusidikusigapa.pdfIn PDF document text
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/h0e125eps0i15fr5cnb3pbmgco/80336531799.pdfIn PDF document text
    • http://maroba-zirndorf.de/file/dunakaxubawom.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/ae5bm81k76i4ld67orulkvcpl4/zesugupoma.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609696dc6caf0---kilaz.pdfIn PDF document text
    • http://www.blueoak.fr/image/file/24837081150.pdfIn PDF document text
    • http://fenotropil.ru/userfiles/file/guderiwa.pdfIn PDF document text
    • http://www.asslar.de/downloads/lofibalawutanifatufus.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/70830146029.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160a1326a9d4aa---rutigobeza.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c4a5cfd53---46019831522.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/famagusowuwosaludi.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a0892133041---nenujevaloba.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160788de092b07---52148946908.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080bf4f31943---32945171014.pdfIn PDF document text
    • http://mtsskzy.com/userfiles/file/81745719068.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/85bdda2f88cef94d797b3c7d3f492de3/kaxogojajuzabaku.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/r2pscqno17gj037pr5aqgugpam/mesaxobunizipi.pdfIn PDF document text
    • http://selfmadefilms.nl/userfiles/files/6681722897.pdfIn PDF document text
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/36d4e9e21a01559a2e233eaf875e034a/nukerewivaf.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/2kkol2fdbq3gls8r3t01jp4s13/17932828045.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_off0001b2b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B2B1 10624 bytes
SHA-256: 883824c0005484c452a65d8e9f379a6dafda9c1e478220915f10f9abcb8653e5
font_01_sfnt_off0001cb03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CB03 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001e315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E315 21308 bytes
SHA-256: edf1920cddf3fbeb3482c37b58a067cf2427f8e95b1167ad8b99eb7f285b2143

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