Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bf6773315957fb0…

MALICIOUS

PDF

71.2 KB Created: 2021-06-08 18:42:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f74c45e4273920d81406c8e54bf0121 SHA-1: d9b093bd86fcc486eede777476415ec6b74e1268 SHA-256: 1bf6773315957fb01a592f34c68f990f44e356ca25c3a2cb74b24c51d4e718b1
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains numerous links to external websites, many of which appear to be compromised WordPress installations used for hosting further malicious content. The embedded content suggests a lure related to movie subtitles, likely to trick users into visiting these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://laborke.ru/uplcv?utm_term=kirik+party+full+movie+with+english+subtitles
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/tl03dd517iegav1a9l3c3n5c3k/tovibasivenobanaweri.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd26c24bbf---namixodejegoki.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff5504d9fa---fubuketufivomuwag.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/bdtamtbmeljma54mhjd7jr3j34/12835755093.pdf
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607d782256203---56070742486.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608726536b8a8---davedekokitebinuvoxiraj.pdf
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/7842d346c30995c69730bc70b677c443/85290138502.pdf
    • https://triptoboloyfoundation.org/editorsfiles/files/63025690121.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e211e342d6---wejomiwud.pdf
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/821479b7253c47ae07e6b009347df4f5/sivibosefalibimekasu.pdf
    • https://fonixkoncert.hu/upload/file/mexevawu.pdf
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/183fb8399ff391c5107ce1aca6ca8b10/12851192433.pdf
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/48a23550fc5a36214f1ab051d9633014/vopevetidanupubisipebe.pdf
    • https://equantumconsulting.com/files/files/76383875273.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/47d890585c7d7d1a65c40b4582315c09/nosuwolevuno.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5e7.bin
a5274db000fdfb551f5f7a22731ffa411bf7e07d09dd251d90637323aafe8a81		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E7 5744 bytes
font_01_sfnt_off0000e96d.bin
cc1c730bcc1c59cc60ae1abbbfbd8c8aa7cf523f58625aa39215440b302fd86b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE96D 11244 bytes

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