Malicious PDF — malware analysis report

Static analysis result for SHA-256 971bfbaf0932790a…

MALICIOUS

PDF

108.4 KB Created: 2021-09-22 20:13:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 5cdb593c9cf5485fc98a70028910a2f0 SHA-1: f454a97576ebec0bb7b9c43f12ac64616d47d73a SHA-256: 971bfbaf0932790a090b0d538061d7b88929cbe80b419abcd83aff889eebec1a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable hosting. These links are likely intended to lure users into clicking them, potentially leading to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://huntic.ru/uplcv?utm_term=list+of+stock+android+phones+2020 PDF link annotation
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/435954029f7a7bd438a76691f3e65c09/46028033349.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1614848a0dd086---56239802048.pdfIn PDF document text
    • http://shop-exclusive.cz/userfiles/file/74864441002.pdfIn PDF document text
    • http://sun-dr.com/uploads/files/202109051048015739.pdfIn PDF document text
    • https://emons-verlag.com/testarea/cwsCMSlight/media/files/fitasizerezabaluvodavu.pdfIn PDF document text
    • http://elverum-revmatiker.no/images/file/menijixizuxafetesog.pdfIn PDF document text
    • http://xn--aknmedcal-wpbe.com/uploads/file/tibomogu.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/dd41da9a086046c2c88bb032783a63fe/50939405045.pdfIn PDF document text
    • https://visualmotion.nl/uploads/file/99092374697.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161346a3a7f8e3---dijokunaberudisal.pdfIn PDF document text
    • http://jtg-antracyt.pl/files/file/wagerupepododowor.pdfIn PDF document text
    • https://www.tahitotfaluovodak.hu/ckfinder/userfiles/files/damud.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/lelotimenakevovef.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/37605301468.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/5636158928d3f3a5e82edd3dcb6c39de/39712882883.pdfIn PDF document text
    • http://www.synagoge-stommeln.de/ckfinder/userfiles/files/tapadof.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/161489882ce869---86646285396.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16145a1db943c7---50990254878.pdfIn PDF document text
    • http://llux.vn/uploads/files/laname.pdfIn PDF document text
    • http://allineers.netlovestories.com/upload/files/84817626992.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/topemitalepilawusazogukid.pdfIn PDF document text
    • http://www.elstar.ru/uploads/files/dudolaxareg.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/12890293157.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_off000141bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000159cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159CD 18692 bytes
SHA-256: eef78527d5f115306e322da1b2245b2f1495733d71b4f8bc0e14aa2a2883c762
font_02_sfnt_off00018a10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A10 10960 bytes
SHA-256: c7453c819f4fe484f5aba6ecc0ee660382504239ef14e027b2606daf97c3906d

Open this report in the interactive analyzer, or submit your own file for analysis.