Malicious PDF — malware analysis report

Static analysis result for SHA-256 d74a097028328e40…

MALICIOUS

PDF

90.5 KB Created: 2021-10-05 10:16:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: bae1651b910d4cc96e1f1f3643a12a26 SHA-1: 34f28d69b766bcd11948fe7d3cdf4bf3b5b3a835 SHA-256: d74a097028328e403abf9a368daac8c503b814613da1f979b97ececd32aea88d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous external URIs, many pointing to disposable hosting and disguised with UTM parameters, suggests a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a lure to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://rajaunited.com/contents/files/87780108073.pdf In PDF document text
    • https://miet.hu/kepek/8058294906.pdfIn PDF document text
    • http://dobre-jaja.com/Upload/file/gipegefenixekej.pdfIn PDF document text
    • http://fairway.cc/images/blog/file/pijitezexef.pdfIn PDF document text
    • https://rosedreamholidayhomes.com/ckfinder/userfiles/files/zexexiv.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/88356c2216beeab2c714ed923630af06/tagapolukatalibalu.pdfIn PDF document text
    • http://sadiqandsons.com/userfiles/files/bagolagemesofipajarilas.pdfIn PDF document text
    • https://ww150007.linebot.net/upfile/files/20210926151637.pdfIn PDF document text
    • http://boilerservis.ru/uploads/files/62396563870.pdfIn PDF document text
    • https://rizecanreklam.com/images/file/muwexo.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/larow.pdfIn PDF document text
    • https://tsolisp.com/files/file/48343403893.pdfIn PDF document text
    • https://archielectronics.com/userfiles/files/beduzikute.pdfIn PDF document text
    • http://tourhong.com/FileData/ckfinder/files/20210921_98B6F8C6FC75FB69.pdfIn PDF document text
    • http://remobudostol.pl/pliki/fojawopizawegiwo.pdfIn PDF document text
    • http://epicridesnepal.com/files/vovinopatajog.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16142655d47065---gukokesixekaribatanif.pdfIn PDF document text
    • https://yellowstonewildlife.com/62546327815.pdfIn PDF document text
    • http://fitviewer.com/files/file/88837886248.pdfIn PDF document text
    • http://nsfeed.com/_UploadFile/Images/file/99099447568.pdfIn PDF document text
    • http://sushiosushi.com/uploads/files/30213141066.pdfIn PDF document text
    • https://idroilektriki.gr/files/file/kedudaf.pdfIn PDF document text
    • http://whitedwarf.ru/public/images/ckfinder/files/pilumazedupolakewuvufa.pdfIn PDF document text
    • https://koratspring.com/upload/file/polipike.pdfIn PDF document text
    • http://ferrocom-spb.ru/userfiles/files/66055702617.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=pokemon+x+and+y+game+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_off0000f538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF538 10528 bytes
SHA-256: febab8b9f5fbf263ce90805dd24f0d8809440c14393dc2a4f4b52c047699bd30
font_01_sfnt_off00010d0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D0A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001251c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1251C 21196 bytes
SHA-256: 9dc57204b786017ccdc8bc1576722e8c4ad8256131bb52a861004ec974e6081b

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