Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b0ed8b9aabe96ed…

MALICIOUS

PDF

97.4 KB Created: 2021-09-16 20:55:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ab44ca17513f4e23d633abf52b5217b2 SHA-1: 62dbca41712088481b4afcd91789c64889d8a827 SHA-256: 6b0ed8b9aabe96ed99527904e592ee7d5750b653ea1eed698f6257c47c90a696
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous external links, with one heuristic specifically identifying it as a link farm on disposable hosting, suggesting a phishing or redirection scheme. While no scripts were explicitly extracted, the nature of the PDF and its numerous external links strongly suggest it is used as a lure to direct users to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://firmabudowlanawalczak.pl/web/uploads/files/vuxetotaruretovibex.pdf In PDF document text
    • https://ssmahavidyalaya.org/lion/uploadedfiles/fck/files/file/85777310483.pdfIn PDF document text
    • https://clove7.com/userfiles/file/30226605419.pdfIn PDF document text
    • http://orel-trinity.ru/sites/default/files/file/38853992575.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/rexuxowamibowekogoxerogi.pdfIn PDF document text
    • http://diamantina-joaillerie.com/ckfinder/userfiles/files/33646119121.pdfIn PDF document text
    • https://romalasergroup.com/userfiles/files/nunegoputebonedofuwide.pdfIn PDF document text
    • http://koyomisushi.com/uploads/files/30495601031.pdfIn PDF document text
    • http://nessie-vinylcare.com/file/90504753232.pdfIn PDF document text
    • https://leganordavigliana.it/uploads/file/46131681353.pdfIn PDF document text
    • https://ikansambel.com/contents/files/34878867999.pdfIn PDF document text
    • http://topp.pl/_topp/file/26778919374.pdfIn PDF document text
    • http://www.rajpuc.pl/pics/file/zusedasimozipodedut.pdfIn PDF document text
    • http://canxetaianhduc.com/images/file/gulox.pdfIn PDF document text
    • http://ciarajewellery.com/editor_upload/file/41570706250.pdfIn PDF document text
    • http://penzionnakrizankach.cz/ckfinder/userfiles/files/74763444754.pdfIn PDF document text
    • http://batterseataxi.com/survey/userfiles/files/sununawadefuvik.pdfIn PDF document text
    • http://bisenzia.it/userfiles/files/fafoxaxenatotinavakipeluv.pdfIn PDF document text
    • http://maasmartcity.com/userfiles/file/29480891515.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613f74dcec16f---kijowovevubifarijiwafo.pdfIn PDF document text
    • https://medarbindia.org/ckfinder/userfiles/files/tigufe.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1614253d4b83ce---kigimematep.pdfIn PDF document text
    • http://ajisushionline.com/uploads/files/41608227409.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=androides+dragon+ball+zPDF 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_off00010e91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E91 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000126a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126A8 10504 bytes
SHA-256: f27caa8aea00071ece20563ef40681868aed0249bd2f8946fc0e907efa31e6e3
font_02_sfnt_off00013e72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E72 22112 bytes
SHA-256: 9756653f91cf11dc522f1971640d87e7506fc14e63b05f0823a6fa789d91a65d

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