Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e8df2479f57d8f4…

MALICIOUS

PDF

74.0 KB Created: 2021-09-11 17:26:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 68e7c35cd53f0278265f3f76717a31c5 SHA-1: 68558b8615259ccd6489641d7588a4c4447b3086 SHA-256: 5e8df2479f57d8f4582490359f72d21814e4d3ef25172cfacda9ccd1c9ceef22
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://huntic.ru/uplcv?utm_term=mcpe+monster+furniture+mod PDF link annotation
    • http://skncn.com/u/files/92059839437.pdfIn PDF document text
    • http://omni-links.com/images/blog/file/tuwurumefeladanelas.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/16133897e52dce---mesegidigo.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/tgvh8nu8dpc4p2tsp0ph2hkrcm/55243262130.pdfIn PDF document text
    • http://labonscafe.com/userfiles/feguwujujupilakax.pdfIn PDF document text
    • http://thuonghieutoancau.vn/uploads/files/siburolewisabosafumasoli.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1613b4880669b9---68212904402.pdfIn PDF document text
    • http://patanjali.zohukum.com/ckfinder/userfiles/files/49083359751.pdfIn PDF document text
    • http://hyunshin.net/userfiles/file/vibugikewijami.pdfIn PDF document text
    • http://baiduvpn.com/upload/files/mukopemusigib.pdfIn PDF document text
    • http://firstcuwire.com/file_media/file_image/file/78581164069.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1612f93a6be96e---wodinadotisofufonitefoku.pdfIn PDF document text
    • https://jkmart.net/FCKFiles/File/66793613038.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/49045783567.pdfIn PDF document text
    • http://drcleancenter.com/uploads/files/202109082248023906.pdfIn PDF document text
    • http://knipia.com/userfiles/file/59404506335.pdfIn PDF document text
    • http://thayloilocnuoctaihanoi.net/upload/files/finevopiperakipupowuwasi.pdfIn PDF document text
    • https://www.totspotdaynursery.co.uk/ckfinder/userfiles/files/59014915661.pdfIn PDF document text
    • http://kondicionery-shodnya.ru/upload_picture/file/gifefisuritoretej.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/robodilafemiwaxira.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1612fbcfc6b798---zimevemi.pdfIn PDF document text
    • http://zhhyhb.com/uploadfiles/files/pezatulogomuwik.pdfIn PDF document text
    • https://rpaxis.net/userfiles/file/fibufanumakojupejeje.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_off0000bd6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD6A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD581 10668 bytes
SHA-256: d003d4aea6058b329777bfe6f289428c8fb2cbbbd886dc160e57ea27b64442da
font_02_sfnt_off0000edee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEE 17320 bytes
SHA-256: ea0de378597e54264dd03b3e768fa6f7729741fe28d6f8dec952b1b747ed5fb6