Malicious PDF — malware analysis report

Static analysis result for SHA-256 feb3d468dd0e91c5…

MALICIOUS

PDF

100.3 KB Created: 2021-09-19 20:58:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: a005bfe59905756af54ae6bc6464ec56 SHA-1: e34c9aa10fe98c890b9da7437977ab8752ce3f41 SHA-256: feb3d468dd0e91c54908ad209a2360a96388b372b956fe272f28b7b6c521d6d2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to form a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the PDF structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ietc-oman.saktoon.com/userfiles/files/finasesox.pdf In PDF document text
    • http://massarentearchitettura.com/userfiles/files/61316695362.pdfIn PDF document text
    • https://thefertilizerproductionline.com/d/files/17544251350.pdfIn PDF document text
    • https://rugerwafers.com/demo/ruger/beta/userfiles/files/foveji.pdfIn PDF document text
    • https://habibitours.org/ckfinder/userfiles/files/13981806398.pdfIn PDF document text
    • http://24horasnoar.com.br/ckfinder/userfiles/files/60605071592.pdfIn PDF document text
    • http://ammk.sk/userfiles/file/23135848956.pdfIn PDF document text
    • https://phr4u.com/files/38079782433.pdfIn PDF document text
    • http://bdsps.org/slbdavbatala/userfiles/file/beviseniwiwa.pdfIn PDF document text
    • http://7sate.com/filespath/files/20210913190947.pdfIn PDF document text
    • http://keystoparadise.com/userfiles/files/65226367916.pdfIn PDF document text
    • http://haihengpharm.com/upload/files/76445845658.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/ue1je865kharla2as3rcne4qoq/30780086791.pdfIn PDF document text
    • https://weborder.cloud/userfiles/file///11226714386.pdfIn PDF document text
    • https://bomando.bomsolar.com/uploadfiles/files/kapedupenisefik.pdfIn PDF document text
    • https://zahrek.com/userfiles/file/39354113541.pdfIn PDF document text
    • http://terralis.eu/catalogue_dynamique/file/77320767744.pdfIn PDF document text
    • https://www.domaine-vrignaud.com/ckfinder/userfiles/files/21399665270.pdfIn PDF document text
    • http://taikenplan.jp/ckfinder/userfiles/files/jekoke.pdfIn PDF document text
    • http://kythuatviet.vn/uploads/userfiles/file/wolozabesutag.pdfIn PDF document text
    • https://restaurant-kamkok.fr/img/Data/file/nipipuvubujodiz.pdfIn PDF document text
    • https://bucatariizidite.ro/printuri-fi/files/13382268776.pdfIn PDF document text
    • http://emrc.ie/upload/imagecontent/file/73101998729.pdfIn PDF document text
    • http://sergeisurzhin.ru/ckfinder/userfiles/files/mopegurir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=crash+bandicoot+the+wrath+of+cortex+androidPDF link annotation
    • 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_off000123df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013bf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BF1 17736 bytes
SHA-256: 694b8c053968368bc7cbe5d9491f6f2c11e1c3a5ccfef90b26156cc9380dbbbd
font_02_sfnt_off00016a5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A5C 10888 bytes
SHA-256: 0442253f6be08235e343348c83e26a0acaa6a89f9a9f82c7adff982f9643efd9

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