Malicious PDF — malware analysis report

Static analysis result for SHA-256 32083f9e29ea4377…

MALICIOUS

PDF

72.5 KB Created: 2021-09-03 09:09:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7139135bd96f6bfdedc16170eca31bd8 SHA-1: 591b3ef218e74f4029a3fca1175160319f51a170 SHA-256: 32083f9e29ea43776f4943709aa225bb684f2b50a6341d605515c79f6fcea0a7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress sites and potentially disposable hosting domains. The primary URL, https://crysiq.ru/uplcv?utm_term=hindu+dharma+pdf+in+tamil, suggests a lure related to specific content, likely to trick users into clicking through to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9915

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://crysiq.ru/uplcv?utm_term=hindu+dharma+pdf+in+tamil PDF link annotation
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9f27482308---gaxupetanezejikazeregop.pdfIn PDF document text
    • http://dichvutot99.com/webroot/img/files/dekozozalufop.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607550df48b9e---74008499567.pdfIn PDF document text
    • http://wingprocess.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/revawimuxifexuvogapojusu.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608925b7022ec---nugisixegomenusufexuwor.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b299d427f38---46023997925.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/perepazabisufisovumera.pdfIn PDF document text
    • http://gongotour.com/FileData/ckfinder/files/20210614_43C27DCDD9E8BAAF.pdfIn PDF document text
    • http://cameradungphat.com/uploads/files/liwopinipagivezofibe.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/72975549740.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/16092b15ea19a9---71189552505.pdfIn PDF document text
    • http://old.smartplus.pl/ckfinder/userfiles/files/lazogarewoma.pdfIn PDF document text
    • https://www.tahitotfaluovodak.hu/ckfinder/userfiles/files/luxibogoxaxekebe.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/18bf41a49bdaec94f91eb9248c2a08a5/fawutirogati.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160944e5e0c2f6---37578583567.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160bf4b08145e6---3083739757.pdfIn PDF document text
    • http://hebammenglueck.de/ckfinder/userfiles/files/pesigatos.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/11628876310.pdfIn PDF document text
    • http://ketnoikienthuc.com/upload/files/10408470731.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/344688c4d65cbd2d955b1d9eacd218c4/41416327178.pdfIn PDF document text
    • https://romalasergroup.com/userfiles/files/pobivumematowiwilanif.pdfIn PDF document text
    • http://miele-service-center.ru/uploads/files/dobigipamelejopupero.pdfIn PDF document text
    • http://kartywspomnien.pl/uploads/assets/file/87604221198.pdfIn PDF document text
    • http://keacg.com/upload/files/80924384560.pdfIn PDF document text
    • https://tidurmalam.com/contents//files/84808134368.pdfIn PDF document text
    • https://lexcyberia.com/userfiles/files/40807785942.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_off0000b7ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7CA 10432 bytes
SHA-256: f219991091c8ef1f589491b33c92cf5029dbe82af45d1cf22891cbf6996b0d27
font_01_sfnt_off0000cf18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF18 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e72a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE72A 18068 bytes
SHA-256: d5bdda20f8e655b40f2fe51d426df52712daa4ff1680ea22f6696de5ab3ba10a

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