Malicious PDF — malware analysis report

Static analysis result for SHA-256 e29449b877b21042…

MALICIOUS

PDF

91.4 KB Created: 2021-08-21 05:18:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: cae36bf592c2dcd6fdce97652fc51457 SHA-1: efef69da46b7850e798870e1ca3c5acbdd7ec4e8 SHA-256: e29449b877b21042dcd9e562a6088cee31aff14f6562b653d166d4ff9340799b
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm hosted on various domains, including compromised CMS uploads, designed to direct users to further malicious content. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to evade initial gateway scanning. ClamAV detection and ML classification confirm the malicious nature of the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9718

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://namratalakhotia.com/userfiles/files/sekoxavenifikugeno.pdf In PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/e2b9gnsljpv7a4q9ng5jmo7c63/38586631525.pdfIn PDF document text
    • https://digireg.se/upload/tokujesevaxofifusepe.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/92279724bfc3cfd1598369eee48b3d2f/43891671852.pdfIn PDF document text
    • https://miruyuta96.ru/admin/ckfinder/userfiles/files/ririt.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607225af4b3f0---880212758.pdfIn PDF document text
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c926ea68f8---zatupisiza.pdfIn PDF document text
    • http://portaldeaquidauana.com.br/ckfinder/userfiles/files/58781671757.pdfIn PDF document text
    • https://totalmediasolutions.ae/ckfinder/userfiles/files/76425526756.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eade891483---82948011149.pdfIn PDF document text
    • http://tcurryproperties.com/konadnew/userfiles/file/54578920064.pdfIn PDF document text
    • http://shreejians.com/userfiles/file/sosazilojevidotekepobi.pdfIn PDF document text
    • https://drinkpoint.com/uploads/files/jinevefuxakovo.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f4fb2b34c0c---78034256817.pdfIn PDF document text
    • http://a899.net/userfiles/file/19518506191.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/2fdc94858042597e921a143d092e3c8f/tasoxiwijixoximabudijago.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607055fd03297---xijofe.pdfIn PDF document text
    • http://bukharajohnscreek.com/sites/default/files/file/68789562829.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/757743f6d07170cbdbe44967c08b9ef9/xogupufezu.pdfIn PDF document text
    • http://feach.ie/images/uploads/file/razedajivonawime.pdfIn PDF document text
    • https://jesssmithtri.com/jesssmith/ckfinder/userfiles/files/4138993715.pdfIn PDF document text
    • http://wannawwannie.pl/userfiles/file/95594649662.pdfIn PDF document text
    • http://interface-referencement.com/userfiles/file/gusegirifalixopavabem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=what+shows+and+movies+are+on+cinemaxPDF link annotation
    • 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_off00010a62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A62 16560 bytes
SHA-256: b10f613d6b146dd1515c097a8f565ac723a39548346640cf52d0121850e1826a
font_01_sfnt_off00013599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13599 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014db0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DB0 10836 bytes
SHA-256: 0b1fb614851f21cc7de8a8b726c5057297f833002b73b8c08872ed67f3756b17

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