Malicious PDF — malware analysis report

Static analysis result for SHA-256 e55c34185aedf7d0…

MALICIOUS

PDF

68.7 KB Created: 2021-10-04 05:03:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: db0be4d8b1f4e3984c8cbbe7d5b7d53c SHA-1: b1899c26c8e9b35913fccd2af8cf1a5bdfc1b8f9 SHA-256: e55c34185aedf7d01d76ba2cd92b8cbb877c7ea21bb0effc30ed5e2f8672f5e7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are structured as link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://krisoc.ru/uplcv?utm_term=where+can+i+watch+lord+of+the+rings+fellowship+of+the+ring PDF link annotation
    • https://salvamontbihor.ro/app/webroot/files/userfiles/files/vutusuxijez.pdfIn PDF document text
    • http://www.fuchingrading.com/upload/file/zapojololigepizaxuzuju.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/7f90f365ce3c896a5e6fec9978c6a6c0/55113075800.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/riziliwikowexolujavifemo.pdfIn PDF document text
    • http://debnine.net/UserFiles/File/21936028060.pdfIn PDF document text
    • https://franchisefarm.franchiseharbor.com/files/files/kujalilupixifidofo.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/fukusurokilep.pdfIn PDF document text
    • http://bogaarchitetti.it/userfiles/files/letavokivagixogonitowewu.pdfIn PDF document text
    • http://stamforgtechnologies.com/uploads/27744172953.pdfIn PDF document text
    • http://honyi.tw/ckfinder/userfiles/file/41177584392.pdfIn PDF document text
    • http://qualityspices.in/ckuploads/files/rawizelibup.pdfIn PDF document text
    • https://speedwayinfo.hu/uploads/file/wadupugimoxadelekogos.pdfIn PDF document text
    • http://mojahotels.com/ckfinder/userfiles/files/tetaxujejetaloligepejave.pdfIn PDF document text
    • http://tao-oita.com/admin/upload_filesfile/nutepadilogobijupu.pdfIn PDF document text
    • https://concurs-euclid.ro/upload/fck/gapuxanib.pdfIn PDF document text
    • http://szintai.hu/ckfinder/userfiles/files/18763538881.pdfIn PDF document text
    • http://rudolphalexander.com/uploads/files/90357294880.pdfIn PDF document text
    • http://vallovin.it/userfiles/files/bosegasivomopa.pdfIn PDF document text
    • http://townofwinslowin.com/flash/townofwinslowin.com/file/7608662289.pdfIn PDF document text
    • http://buren-kompanie.de/userfiles/files/batasawukobamorajumavus.pdfIn PDF document text
    • https://beysukonaklari.com/ckfinder/userfiles/files/23344159487.pdfIn PDF document text
    • http://fatimaartwork.com/userfiles/file/62222443106.pdfIn PDF document text
    • http://119pump.net/d/files/32520425763.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/rf7pblkbu9f4ailhf9bbp8okc3/81297142615.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_off0000aef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEF1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC708 10976 bytes
SHA-256: bc7d6172ae64927e65daa604673df387ec3bd2abd6231f463f181cdb2433ff3c
font_02_sfnt_off0000e051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE051 14756 bytes
SHA-256: f68394cf47217ad3bdb7c627a347ae3e7e4d4dbe380906d613beed94a2119c24

Open this report in the interactive analyzer, or submit your own file for analysis.