Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cd00e46db60ed09…

MALICIOUS

PDF

87.4 KB Created: 2021-06-28 06:09:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 30710e84ea62901a6531a7452ca43f08 SHA-1: f1b589b949a8433ca09add75d272779fbe299c13 SHA-256: 8cd00e46db60ed09d68917e78ec1774d6535303865acae592eb9764f1cd199c0
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or serve as downloaders for further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://pixomot.ru/uplcv?utm_term=significant+quotes+in+the+kite+runner
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1663ee0a03820f762c8306d8ccee7457/77292641827.pdf
    • https://infrastone.com/userfiles/files/tijolugidubukupila.pdf
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/c3c5deda1e6244a0d4b26a6535bb3902/dajaxuwogefafazibefeses.pdf
    • http://www.asslar.de/downloads/judev.pdf
    • http://sehs67.com/clients/e/e0/e078d4d0076166a7bb489ca3b3a583ab/File/turav.pdf
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16073d5bb8b297---68620984168.pdf
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608b97a96977c---jupusojemunevapazurux.pdf
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/16080a08278f08---mipuwu.pdf
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160aa56cc64169---nuvexasoxegojonati.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/64c2bad80d4923c2656a072ffa9bd1b7/73156741913.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1609881e1eb955---fuxovujim.pdf
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/93f90ff6afb1435dbe23839296c3b97b/tigoletogosusalup.pdf
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/a37eb58b35e22c19a3554e21ebbd8767/8680886360.pdf
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/1u24ufk60nmfp0pqpnn8uo9i75/lolikusukolox.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607837dc2aab0---86499912584.pdf
    • https://cardion.dk/gfx/fckimages/file/balopefibosedig.pdf
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16077970902bfa---lenamozusoliwajon.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/e32aff8d44a3df4207b415f07e86d7b7/binosetadij.pdf
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/e3bb4defd711847720cfa93acf52b507/44913200518.pdf
    • http://animalscipublisher.com/files/upfiles/file/nizapuwexofimeki.pdf
    • http://shsalumniauditorium.org/clients/f/fa/fa32e32112b7cad64a7d7e78b95ed61b/File/surifudejad.pdf
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad05195e5a6---27217129722.pdf
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/6laotsrluitpv04ihpqkbrik0j/tejegipupubijukesenep.pdf
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef104dec9e---99091590177.pdf
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ce92b241ed7---70411629902.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f239.bin
5fd6686853a3553f57c02a598136bddd68ab9806d54ffae3ae4e26d9b0e5def1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF239 10984 bytes
font_01_sfnt_off00010b6a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B6A 16792 bytes
font_02_sfnt_off0001237c.bin
14873b80e408236bf7f9c914e00caaea82d73ca6615adeea67ec762a3f393c94
pdf-font-stream PDF embedded font (sfnt) at offset 0x1237C 16760 bytes