Malicious PDF — malware analysis report

Static analysis result for SHA-256 73d8002f4e31504b…

MALICIOUS

PDF

75.5 KB Created: 2021-09-11 11:22:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 194ff25b31c34717138e445e91dd8dde SHA-1: 846549d526088e4d0303e274bdd72811df2bc2f4 SHA-256: 73d8002f4e31504b3de47de2fea2e1deb5e9ff1b69943a9bddb048e611379413
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to distinct domains, suggesting a link farm or SEO abuse. One URL, http://ucg-eg.com/userfiles/file/10495343221.pdf, is directly associated with the PDF's content and likely serves as a lure or distribution point for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 5

  • 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.
  • 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 http://ucg-eg.com/userfiles/file/10495343221.pdf In PDF document text
    • http://uniquehotelsolutions.com/files/others/motamedejepe.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/1c9835bd7a7dec60b57de8c88ce08c46/80200883803.pdfIn PDF document text
    • https://mfdesign.hu/files/file/25339119978.pdfIn PDF document text
    • https://printsolutions.printsolutions.bg/uploads/wysiwyg/files/repiragikaxisenumolij.pdfIn PDF document text
    • http://deeringbayrealestate.com/userfiles/files/kotipatamevarugo.pdfIn PDF document text
    • https://komunalno-vrgorac.hr/files/tosegorudopebasomomizub.pdfIn PDF document text
    • http://metisentry.net/ckfinder/userfiles/files/31726377370.pdfIn PDF document text
    • https://nikoljski.com/ckfinder/userfiles/files/22440572881.pdfIn PDF document text
    • http://www.valathors.com/ckfinder/userfiles/files/25072746529.pdfIn PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/9173174573.pdfIn PDF document text
    • http://bobmeetin.com/media/galleries/files/natodewojuwipapufaf.pdfIn PDF document text
    • http://bio86.fr/userfiles/fichiers/fuwob.pdfIn PDF document text
    • https://maria-galland.ru/files/file/vuradegapekare.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613781d4e764a---lutibaxevajefuxajofeberan.pdfIn PDF document text
    • http://av-jet.ru/userfiles/file/subomefitobebufisaxipe.pdfIn PDF document text
    • https://dewalt-naradi.cz/media/upload/editor/file/velitugexa.pdfIn PDF document text
    • http://mitchelllawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/58048970554.pdfIn PDF document text
    • http://primaria-ciocirlia.ro/media/file/74035752124.pdfIn PDF document text
    • https://suativisamsungtaihanoi.net/upload/files/futamesuvenabujoxedulagek.pdfIn PDF document text
    • https://kratky.eu/files/file/48073688139.pdfIn PDF document text
    • https://marljivo.hr/UserFiles/files/xulugodunagosanijamo.pdfIn PDF document text
    • https://noticky.net/akce/fotky/file/5822589657.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=clash+of+clans+hack+tool+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_off0000c257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC257 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000da6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA6E 10456 bytes
SHA-256: 63c0e28d03c8ce88ab5f647880cc7d3e7e95a5a35c90a8cb7696e80c0ec5ddbd
font_02_sfnt_off0000f23c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23C 17836 bytes
SHA-256: 819bffa3379681bf70e087e968e3d87b57687d4aca3461c10186806e0d14c9f0

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