Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f5dae47db6c65f9…

MALICIOUS

PDF

68.9 KB Created: 2021-09-16 05:17:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: b47725f6c9fe5917fdbdc97a92d8a2c9 SHA-1: ca5e9b26882a024495cd79e3ae90611897f90a38 SHA-256: 0f5dae47db6c65f9bb52c5e547c641e952f9525ffa522e5f3430efaa66b2d382
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and is described as a link farm on disposable hosting, suggesting it's used to redirect users to potentially harmful websites. The presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://nomylo.ru/uplcv?utm_term=roohi+full+movie+online+play PDF link annotation
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/01l2iv8av9or58datedl2mgtb4/paninesanafiza.pdfIn PDF document text
    • http://80tner.friend-match.com/upload/files/mubajomipepazadojaje.pdfIn PDF document text
    • http://knauto.com/upload/file///bokivajunekubunotozejumi.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/zusovejelozu.pdfIn PDF document text
    • http://truhlarstvisollner.cz/data/file/rokus.pdfIn PDF document text
    • http://aokisuper.com/ckfinder/userfiles/files/terob.pdfIn PDF document text
    • https://chp-travel.ir/data/file/valeselubugiwofo.pdfIn PDF document text
    • http://alptw.com/images/files/vaxutedusuvezowotasuminor.pdfIn PDF document text
    • https://ksmt.edu.np/assets/ckfinder/userfiles/files/49034451024.pdfIn PDF document text
    • http://entryexpress.online/chapter_images/files/zizaxuxetejipi.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/92bihbccmisgub1hvjndhjp8m1/22701850362.pdfIn PDF document text
    • http://hyunshin.net/userfiles/file/dixuxe.pdfIn PDF document text
    • http://centrons.com/uploaded/file/668868972614026ca9b871.pdfIn PDF document text
    • http://autosvilar.com/uploads/ckfinder/files/joxosopugajoxegorofi.pdfIn PDF document text
    • https://qkon.ca/images/file/5686232106.pdfIn PDF document text
    • http://webbuilders.com/files/file/zidawi.pdfIn PDF document text
    • http://miraesusan.com/ckupload/files/jufajonufasowilasezexotan.pdfIn PDF document text
    • http://www.startbatteries.gr/ckeditor/ckfinder/userfiles/files/bilodozimim.pdfIn PDF document text
    • http://raylutickenterprises.com/userfiles/files/tuditaxokupo.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/jikekeluwakitur.pdfIn PDF document text
    • https://havilahbuilders.com/userfiles/file/94317751427.pdfIn PDF document text
    • http://thekitchendesignstudio.org/uploads/files/35847571087.pdfIn PDF document text
    • https://guineaservicesproviders.com/gsp/files/75451696165.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_off0000aedc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEDC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c6f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6F3 10584 bytes
SHA-256: 91ba6dbcd71f879d68b6cbf18b555ddcf966457a485a8ed1f5349568ad7c864e
font_02_sfnt_off0000deeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEEB 15376 bytes
SHA-256: c065356b543b8fdcbfa3c86ec4dcdbbae5b40713c2290cd84b74433f7241648f

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