Malicious PDF — malware analysis report

Static analysis result for SHA-256 59c019c1c2fad04c…

MALICIOUS

PDF

80.6 KB Created: 2021-09-21 20:05:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f43a0b761c4b6393940dda8aebbd791e SHA-1: 88aee17a0aee3ed87f86cdff9476d3f19214a85e SHA-256: 59c019c1c2fad04cef616f56b44a5caf76d096ba388052f52245e7ab205f6fbf
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious content. It contains a large number of embedded URLs, many of which point to disposable hosting and appear to be part of a link farm. The primary purpose seems to be directing users to potentially malicious websites for further exploitation.

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://irlanc.ru/uplcv?utm_term=mobdro+app+down PDF link annotation
    • http://eros-arena.name/eros/userfiles/file/9635415713.pdfIn PDF document text
    • https://copperscraphandlers.com/ckfinder/userfiles/files/29356322798.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140ee053231b---kabozewar.pdfIn PDF document text
    • https://ku4ysk-9lgp4y.com/contents/files/ruwasoguzuva.pdfIn PDF document text
    • http://de.ruben.pl/ckfinder/userfiles/files/29613073410.pdfIn PDF document text
    • http://www.psoealora.es/ckfinder/userfiles/files/2418955442.pdfIn PDF document text
    • https://aquamedicasatumare.ro/ckfinder/userfiles/files/20516106848.pdfIn PDF document text
    • http://gdlianyu.com/uploadfiles/file/bufojapexavog.pdfIn PDF document text
    • https://certifiedcollisionrepair.com/home/cert/public_html/ckfinder/userfiles/files/70800340082.pdfIn PDF document text
    • http://dush-kz.ru/uploads/fck/file/ribodi.pdfIn PDF document text
    • http://www.phuongdonggolf.vn/app/webroot/uploads/files/1895956831.pdfIn PDF document text
    • https://consultemergingmarkets.cubsindia.com/files/3329334518.pdfIn PDF document text
    • http://sushiloverca.com/uploads/files/jimoxoxiponasadadafugu.pdfIn PDF document text
    • https://yenicekentkaplicasi.com/userfiles/file/jinival.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/17985161594.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/b570c8775710c0d35b4dc64aea6e5f2f/nemekikabowerikug.pdfIn PDF document text
    • https://hse.tw/upload/file/sogilaxoxojifejuvoxurores.pdfIn PDF document text
    • https://cdmsig1.com/ckfinder/userfiles/files/loxudakixatijot.pdfIn PDF document text
    • http://apcmagon.com/userfiles/17806084556.pdfIn PDF document text
    • http://guitarenko.fr/img/files/fuvaforom.pdfIn PDF document text
    • http://modernplating.com/userfiles/file/razovukamekugo.pdfIn PDF document text
    • https://titishop.co/upload/files/91320162386.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_off0000d9fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF212 10068 bytes
SHA-256: 0dbed8470cc1eb84f9172cf70ac831388af42f8de1c66631ce1b842fcabd567e
font_02_sfnt_off00010855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10855 17240 bytes
SHA-256: 17819876de6ff1557471fd7c9173f4e86ff29cacdd901bca1d3dd5365e0a9fdf

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