Malicious PDF — malware analysis report

Static analysis result for SHA-256 b01066c8616123b5…

MALICIOUS

PDF

79.4 KB Created: 2021-09-21 05:01:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 996c1806100dec27bcdb51c5a265db1e SHA-1: e792375f18c0d9aee326b0f64790e3e3a48dfa68 SHA-256: b01066c8616123b5d84054456885d6b7008765cdbfc47ad3e6f5f147976d7444
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The 'SE_CALLBACK_LURE' heuristic strongly suggests a callback phishing attempt, where the document prompts the user to call a number for a fake issue. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to deceive users into engaging with a threat actor.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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) 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 http://meadescafe.com/userfiles/file/26946400149.pdf In PDF document text
    • http://angarakshaksecurity.com/userfiles/file/60350887892.pdfIn PDF document text
    • http://ride-on-earth.com/images/blog/file/kitojux.pdfIn PDF document text
    • http://hoadondientu-ptp.vn/images/ckeditor/files/somoxunatiw.pdfIn PDF document text
    • https://presstone.hu/userfiles/file/72726623803.pdfIn PDF document text
    • http://studioarchterreni.it/userfiles/files/vuwarekefo.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16141aee8633dc---xetodojipofedi.pdfIn PDF document text
    • http://ksiclubbiz.ksiclub.org/svnprojects/DHD/Source/images/files/mosebefogokupesubenaso.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/923c95c5fc43d8ec3d7c25543066b2a9/17765337400.pdfIn PDF document text
    • https://alsultantrading.ae/userfiles/files/fezuxogimuzazubuvapim.pdfIn PDF document text
    • http://domuran.pl/files/file/41277685522.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/cc50ae520be03b2869eb9c5fd6c84dfe/34349568117.pdfIn PDF document text
    • http://stressmanagement-karriere.de/userfiles/file/wekigidotifike.pdfIn PDF document text
    • http://sgo-bage.com/public/files/files/70269058027.pdfIn PDF document text
    • http://sgd42.ru/userfiles/file/91717808124.pdfIn PDF document text
    • https://studyhalltracker.com/files/file/49115656295.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/kenapemajabikilipe.pdfIn PDF document text
    • http://orenprom.com/img/account/file/90571236600.pdfIn PDF document text
    • http://emeraldcovepartners.com/_data/images/file/nadikakaniwutenominasozib.pdfIn PDF document text
    • http://avvocato-callegaro.it/public/file/10591441269.pdfIn PDF document text
    • https://cristalparkhotel.com.ve/ckfinder/userfiles/files/30569416381.pdfIn PDF document text
    • http://clinicaveterinariaalbese.eu/userfiles/files/talonadimukanat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=pixel+5+setup+notificationPDF 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_off0000d2b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC7 10708 bytes
SHA-256: 7d0df8695921ce51feafd0f60439385cd70ffbfa32ea8a7c68dbdaa4dc203ea1
font_02_sfnt_off00010398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10398 17052 bytes
SHA-256: a039aebb68754a7280119ba1a7bff0c86ffba6355b9d9a8eab13a4c55361f442

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