Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ced056540cd25bb…

MALICIOUS

PDF

83.8 KB Created: 2021-08-27 10:16:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4146dcf0a9c33f21bb84849af4d1b573 SHA-1: a27b0182f0056eda791e4ee507df29b5a4915307 SHA-256: 3ced056540cd25bb9d887c7ca19ff8a5d9611f0a5cf23525f5d1fe6b79f7b039
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple external PDF files hosted on compromised websites, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/b612d92b38dda4224e723b59ad47e85d/25260742801.pdf In PDF document text
    • http://prinsart.ro/uploads/files/dapebege.pdfIn PDF document text
    • http://mysistermyfriendministries.org/clients/85776/File/94300286431.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/4fjb43mtv0t21djh67025nu8g2/20387173828.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/semas.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/85891721696.pdfIn PDF document text
    • http://polloricowings.com/uploads/files/21351628817.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072914a08ff2---xozomofexinemafamavebalod.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160822acd82feb---80667450099.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0267731001620510839.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160f7159b40e05---vutazolenoga.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/93277ea5b839acf0058dfe1c0517b981/kapugubi.pdfIn PDF document text
    • http://kirsanov-maslo.ru/uploads/94261507687.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/9b3af0883d1af083075ea97285d5036e/67765285711.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1610a204169079---44020149259.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608daca050e3e---4795212710.pdfIn PDF document text
    • http://bigsvatcharasith.com/userfiles/file/wewereluj.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/16085e939d5e43---lotobezoxekugorepi.pdfIn PDF document text
    • http://swiftnb.com/ckfinder/userfiles/files/bozamose.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/7cf0b573997d3b6567c1ec34b6203b3e/45768277875.pdfIn PDF document text
    • http://kistours.hu/userfiles/file/tivase.pdfIn PDF document text
    • https://anukulagrotech.com/ci/userfiles/files/pozepirosegul.pdfIn PDF document text
    • http://xlsferrosilicon.com/d/files/givejozavoko.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/d295cc385fcd2aec22ac47a4c3f677ea/gawebugo.pdfIn PDF document text
    • http://inter-travel.hu/_user/file/vibogitifikape.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=steps+completing+the+squarePDF 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_off0000dc3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC3F 19948 bytes
SHA-256: 21ab480d16702941874ce14ac0a7ebc6629a60ad0441a588d9381054b9a61256
font_01_sfnt_off00010ee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE9 11140 bytes
SHA-256: 8cf656f4f6b2585532bec95d184daefacde96d6da076dbab759aab6ab9762ddf
font_02_sfnt_off00012860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12860 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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