Malicious PDF — malware analysis report

Static analysis result for SHA-256 a39479f2062599ec…

MALICIOUS

PDF

79.6 KB Created: 2021-09-12 04:48:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: a2f6f6c0fc133ea87e58ceaf2f44a4ef SHA-1: de38c4350a60cb66c0d75a36fc92af37f3cc2997 SHA-256: a39479f2062599ecc15e3bbcd7ee7248950ce0c386c714b2b47ac1a7a9750e4b
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to disposable domains, indicating a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely responsible for redirecting the user to these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://landatur.com/files/galeria/files/81311764930.pdf In PDF document text
    • http://tjtvina.com/Upload/files/semorumejamada.pdfIn PDF document text
    • http://rmgoals.com/userfiles/files/52240636459.pdfIn PDF document text
    • https://cecprint.com/images/file/kuzupipoban.pdfIn PDF document text
    • http://dissanna.com/temp/fckeditor/file/revidog.pdfIn PDF document text
    • http://makesrealsense.com/ckfinder/userfiles/files/95353060036.pdfIn PDF document text
    • http://physio-praxismitte.de/userfiles/lejunanewevuti.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135f98b01536---zasarumog.pdfIn PDF document text
    • https://lanna-flyingclub.com/ckfinder/userfiles/files/85357392520.pdfIn PDF document text
    • https://gdaniec.com/upload/files/vituxevibatanibuxadeg.pdfIn PDF document text
    • https://rmp-familienanzeigen.de/cms/files/sasivoga.pdfIn PDF document text
    • http://donauwell.at/userfiles/file/zujiwisasoxug.pdfIn PDF document text
    • https://www.hemingway.bg/app/templates/js/ckfinder/userfiles/files/50807368074.pdfIn PDF document text
    • http://inbond-cn.com/userfiles/file/jopadunap.pdfIn PDF document text
    • http://ekorob.pl/userfiles/file/9214818500.pdfIn PDF document text
    • https://mimpidia2.com/contents/files/tamejubamarevatowomevoxa.pdfIn PDF document text
    • http://krakow4you.pl/krakow/files/delapupe.pdfIn PDF document text
    • http://biogenetec.tw/image/files/20210904_054341.pdfIn PDF document text
    • https://ncsccalgary.com/userfiles/files/jotuvominijapotemumapeve.pdfIn PDF document text
    • http://car-zone.sk/data/data/file/30766025738.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/2d6e00a4963c170cb8c6b6d0b078c383/deniripobi.pdfIn PDF document text
    • http://dydlhx.com/upfiles/file///nazaveporisasefogakisexu.pdfIn PDF document text
    • http://etkenkalip.com/files/39090576363.pdfIn PDF document text
    • http://goodtraefarm.com/ckupload/files/28515830461.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=jump+force+android+downloadPDF 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_off0000d52f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD52F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED41 16636 bytes
SHA-256: 3f82a6c48fa7635e857089fb14e6442d215871955db54f979b1da751e79e2d0c
font_02_sfnt_off00011880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11880 10692 bytes
SHA-256: e20af6c4e6cfbbb9a7a0ee6c79adb7919ac8b36d7ee26c2ea710063cf841e260

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