Malicious PDF — malware analysis report

Static analysis result for SHA-256 bebb8e65a77f9e7c…

MALICIOUS

PDF

86.0 KB Created: 2021-09-07 03:34:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 10cfeb75e2ef02aae709ceb9169838f4 SHA-1: 44175aed73634f143a8a57996f2902c52407cd04 SHA-256: bebb8e65a77f9e7c46c36b20e6ec6c1776cea96b3ea089daf49cba5a557e3145
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised or disposable domains, likely intended to lure users into downloading further malicious content or submitting sensitive information. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically highlights its nature as a link farm on potentially untrustworthy hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/16b06caf218b7e418d137eae5545f283/nuderofifupulobimo.pdf In PDF document text
    • http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/jozepopedok.pdfIn PDF document text
    • https://aadharshilaschool.org/userfiles/file/35470504934.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ff0398ad8---dapapab.pdfIn PDF document text
    • http://myshopekerala.com/userfiles/file/jozuxipadoradudo.pdfIn PDF document text
    • https://pui-vital.ro/msg_media/file/zosozorupozazaja.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/1ndp9vnnut1kphbel2tlf4uks5/13261608068.pdfIn PDF document text
    • http://www.domplit2006.ru/ckfinder/userfiles/files/76329561435.pdfIn PDF document text
    • https://skatrip.com/basefile/skatripcom/files/vogumawavabefo.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/d84390306f004a34e690e44652b8c7d9/87389901443.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e9016357e07---xinapazexibuwezexumesava.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/c7cfce43d6a8506e6dd55e6967d782e5/begozuji.pdfIn PDF document text
    • https://monamifrance.com/FileData/ckfinder/files/20210621_7E0021E3214B8EDB.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0141635001620615441.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/gijufudamamegup.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/9ff546e85164898c77db179a76810175/3119293734.pdfIn PDF document text
    • http://zoekidsworld.com/userfiles/file/bulazokajazavazuvasow.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/cgsf2nbognq6oq2o5pvduro95r/gibenelitufaxi.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/20723a1a084b2f7ba743c087393d0ecb/84751540021.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/welabuvisidanosum.pdfIn PDF document text
    • http://praguetransfer.com/files/file/32908595645.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16087efcfd9611---56416491670.pdfIn PDF document text
    • https://www.groupe-coelho.fr/ckfinder/userfiles/files/zarifo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=advanced+java+tutorial+for+beginners+pdfPDF 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_off0000e50e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE50E 19492 bytes
SHA-256: 092ea0c79154ebcdfa28c02541fede7d816d071b65e5e751f30c9bd260cf2a16
font_01_sfnt_off000117d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012fed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FED 11212 bytes
SHA-256: df23eac1469418fac448651164b7f809a0d844f0dfda1de8828f711693c5206f

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