Malicious PDF — malware analysis report

Static analysis result for SHA-256 64089492ce5ed508…

MALICIOUS

PDF

89.7 KB Created: 2021-06-27 16:25:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 290fb8613c28c6f5243a9989735bb2b5 SHA-1: 77e76b36bb94298694ccf59068bf046fefbdd0fa SHA-256: 64089492ce5ed5087a28b083858d36eeb464c1449699ae6f2c47dfcc2bc81a66
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate the PDF contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting a phishing or SEO manipulation lure. The embedded URLs are likely used to redirect victims to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/9a8d82e1af6cda3b6d82eaef53684b13/koxukibevenufebiwumijewad.pdf
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/j0o46oe00djhmscs7smnso7vr0/robefedenolasapo.pdf
    • https://apsco.ly/userfiles/files/rimumofesoligujatabokobud.pdf
    • https://karinbentum.nl/uploads/file/76582024717.pdf
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a97be944a03---63173859453.pdf
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f38793bd93---sibevebovawuwijijesereko.pdf
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/fqcnfh0nsmqnun3ok1iv4fqbue/11684355476.pdf
    • https://biothiennam.com/media/ftp/file/sosim.pdf
    • http://zjxfjc.com/uploadfiles/files/64499719153.pdf
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/0io8i1is1c7m9h4qvg627nqlgi/fozumikeji.pdf
    • https://projectmine.hu/ckfinder/userfiles/files/wisux.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/7f95f14ca1bb16df6151f2eba49542cf/44381438263.pdf
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/119b619c60c264b7f9048f52e21acdad/91626259317.pdf
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/m647isafaq62tfujp2ijpt4n82/61095188347.pdf
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075941723b88---gofubilotov.pdf
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/74c3093fc9edd53630892503bd7520fb/bikerexenomitiruge.pdf
    • https://www.webplease.it/wp-content/plugins/super-forms/uploads/php/files/95huukvsl6vjh8ps8ne091eed6/ropezo.pdf
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609749226dd92---zatogefasofegikijifore.pdf
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/bguhrmji865n67q68mm8srgaee/90982086953.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609d135d390eb---nelefisor.pdf
    • http://harchovyk.com/userfiles/file/lojuma.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607887c5947b0---98480430141.pdf
    • http://musorcentrum.hu/files/article/file/5988256943.pdf
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/a7f5a2d906a24f9c660f413e53061bd5/87392886440.pdf
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/29697363561.pdf
    • http://wrhsclassof82.com/clients/d/dd/dd94ad2327da436b0bfbe5937c3cc641/File/38346458623.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=eyebags+and+dimples+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_off0000fb9d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9D 16792 bytes
font_01_sfnt_off000113af.bin
f6c434603d95bef17a704100732cb68553fcbb378dc4ee00c2fb0e4059a98252
pdf-font-stream PDF embedded font (sfnt) at offset 0x113AF 17520 bytes
font_02_sfnt_off0001417a.bin
4f0bb891cb80e595eb30c5aa1e7a688611cce78a1b848ae5ae2bbcb5c5c6b3a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x1417A 10760 bytes