Malicious PDF — malware analysis report

Static analysis result for SHA-256 206a5ec75deb9d26…

MALICIOUS

PDF

126.2 KB Created: 2021-07-22 07:37:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: bcfbe94df1a7c6e9e46da41a548f6913 SHA-1: 02489d26bea6e10b131641afa9b740b0ce24c67a SHA-256: 206a5ec75deb9d260f4a4b118fa452784e8c99a5e98037ecfe9560c9884ae739
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links are likely intended to lead users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609b87b6f2458---60632820293.pdf In PDF document text
    • http://nuovojob.com/userfiles/files/13435559655.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4ccaf03ed7---nagelaba.pdfIn PDF document text
    • http://centonze-vini.com/userfiles/files/71897178094.pdfIn PDF document text
    • http://anbao.vn/uploads/userfiles/file/jajasodekowukiluka.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8cb8ab309b---watexunedobunuzubadiboj.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba3924335e---71901958704.pdfIn PDF document text
    • http://mvhs1964.com/clients/2/20/2030ff4f331b14c2016b95997514b7ac/File/jerinud.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/pawalopaz.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec981ad9678---bazokikubibagobojomat.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16080179839f10---46893478457.pdfIn PDF document text
    • https://ariconium.cz/webpagebuilder/ckfinder/userfiles/files/nabixifukefig.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/ruzaw.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160de8da36795d---52005873792.pdfIn PDF document text
    • http://sodrex.pl/userfiles/file/tufafizitageni.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090f2a760516---lavipuda.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2b7a71b88b---95001901025.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/39014181010.pdfIn PDF document text
    • https://matrainagycsalados.hu/userfiles/file/46410809405.pdfIn PDF document text
    • http://tvoirostov.ru/ckfinder/userfiles/files/fivirifela.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/76114747871.pdfIn PDF document text
    • http://jongauger.com/ckfinder/userfiles/files/parodifajonamukex.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/1a387d47cfd84c8c68770788519f954d/96161667448.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e5c2aa0b2f4---dinorapitisobojivazox.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/gabusowavukikajepodor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=prosperous+meaning+in+english+to+teluguPDF 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_off00018bde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18BDE 10800 bytes
SHA-256: 768a8e5466b5a58aa7cf1b729bd0c1546a10b9c0517a178d512a930feb4eb7fc
font_01_sfnt_off0001a48d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A48D 17424 bytes
SHA-256: 8826f1cf0f70a2d1f3222b84bd49de03922653db593c88c0e7d2e2edb9fa6d2b
font_02_sfnt_off0001d1c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D1C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1