Malicious PDF — malware analysis report

Static analysis result for SHA-256 00bc6e89b01b00d7…

MALICIOUS

PDF

106.3 KB Created: 2021-06-26 02:30:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: f276325afbfd0567cd967c267843737d SHA-1: 65269ba407aebdeb450634aebbf300bf631c6bde SHA-256: 00bc6e89b01b00d749672c909f64a28ceb95d84356580a42115a18556e86cbd8
176 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a callback phishing or tech-support scam, as indicated by the 'SE_CALLBACK_LURE' heuristic. It contains numerous links to external PDF files hosted on compromised CMS upload storage, suggesting an attempt to distribute malicious content or redirect users to phishing sites. The ML classifier and ClamAV detection further confirm its malicious nature, likely involving exploitation for client execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a453b7340e5---sukizakakusabisadipoze.pdf In PDF document text
    • http://diversecityuk.com/userfiles/file/bebisoxarugexuxapaziwez.pdfIn PDF document text
    • http://popnmusic.fr/userfiles/file/nulujililegunomuvu.pdfIn PDF document text
    • http://pajurioverslas.lt/ckfinder/userfiles/files/95819202929.pdfIn PDF document text
    • http://timebank.ru/sites/default/files/photos/pagefile/53473649877.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/cqag8kodkmk955r991oaom4jgu/nawonusipituzanizeromose.pdfIn PDF document text
    • https://madopin.com/calisma2/files/uploads/xogukazirofiruvipoko.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3c6a0ec22---divijiwitiwifaside.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4d29da8281---xepuwarusozofotegolaxu.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c51d33e8b10---96670654832.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7baa89a17---77729927217.pdfIn PDF document text
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5b6f8b12d---67615003026.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b98e8d59676---xularibunovilitote.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b905a122efb---4289932950.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b1f1426b126---kagikixelaruw.pdfIn PDF document text
    • http://allycatering.com/userfiles/wamejemuxir.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/gag70t5e69rfp7742h7fujonar/97640881878.pdfIn PDF document text
    • https://aronabritcan.com/userfiles/file/51267754031.pdfIn PDF document text
    • https://arket.io/wp-content/plugins/super-forms/uploads/php/files/vjdbb8k89qr1o8is8qq5dde6ph/49593414646.pdfIn PDF document text
    • http://neoneofitou.com/ckfinder/userfiles/files/bimajutefala.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079cf34cb332---pesifofedipomabes.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/d5eba2ff1307a1c844d1476f262d4b85/pogufedadajokelawibolezu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=two+allotropes+of+carbonPDF 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_off00013668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13668 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014e7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E7F 10572 bytes
SHA-256: ddf94669afc315ce9b4b1af48ebbcff5218a018f5d6eceaf42cc0da5543cb93c
font_02_sfnt_off000166a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166A8 20428 bytes
SHA-256: 41c1e1ac99755512785c84f0b0460807a80d5f7984595ca5b79ea5b690fe49fb

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