Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9610149e18c07f2…

MALICIOUS

PDF

90.6 KB Created: 2021-09-17 15:08:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 763b23aad7bd9f06a790fc5be9e24a56 SHA-1: 2a5324f39c9ef435f6d4d8787585746c4833011f SHA-256: a9610149e18c07f223eca14c5d9a26176d468250d5be43a5bd39780cd0c4d5ad
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates the document is designed as a link farm, likely to obscure malicious destinations. While no scripts were extracted, the presence of numerous unknown URLs suggests an attempt to redirect the user to a compromised or malicious site, consistent with phishing or malware delivery.

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://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/4fa2a46b79f6d96080eb1bdc2f56ba3a/zagetevolune.pdf In PDF document text
    • http://www.novosib-sport.ru/ckfinder/userfiles/files/bifivuleg.pdfIn PDF document text
    • https://radekslodkiewicz.pl/files/file/jugowupukaduxop.pdfIn PDF document text
    • https://igruppe.no/ckfinder/userfiles/files/bokijezosavetiwinuvo.pdfIn PDF document text
    • https://machnhaduong.com/images/uploads/files/jurivuvobet.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/44899034750.pdfIn PDF document text
    • http://as-eng.biz/userfiles/file/junovawog.pdfIn PDF document text
    • https://chptravel.ir/data/file/tikanimisaxus.pdfIn PDF document text
    • http://thechelseaff.com/user_uploads/files/78262165383.pdfIn PDF document text
    • https://petandpuppies.com/userfiles/file/didixejutitegevulinejexu.pdfIn PDF document text
    • http://sculecuacumulator.ro/app/webroot/files/userfiles/files/37687783512.pdfIn PDF document text
    • http://textstricker.de/benutzerdateien/32057897184.pdfIn PDF document text
    • http://www.firstpages.eu/app/webroot/files/userfiles/files/dorijudikomewenogoninu.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/161382d33914e6---garugidosiriwuvexiwof.pdfIn PDF document text
    • http://spellenindex.nl/images/uploads/xusejefivajalibomurexeda.pdfIn PDF document text
    • https://okinawa4d.com/contents/files/fonijileru.pdfIn PDF document text
    • https://kujainspectors.com/candyticket/uploads/page_images/files/zuketisebisad.pdfIn PDF document text
    • https://agriplan-rs.com/dados/ckfinder/files/kamipux.pdfIn PDF document text
    • https://stiff.pl/ckfinder/userfiles/files/xalobaxu.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/32852644114.pdfIn PDF document text
    • https://basundharamart.com/userfiles/file/35282048902.pdfIn PDF document text
    • http://voszveszprem.hu/_user/file/43465278980.pdfIn PDF document text
    • http://mientrungland.net/uploads/image/files/13046917100.pdfIn PDF document text
    • https://claudiodituri.it/uploads/gosafoj.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/50023338040.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=note+10+lite+charging+problemPDF 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_off0000fb8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB8F 18448 bytes
SHA-256: 9d2d9c579fc028a4b1101650c83b7a9ea2e8da04a34a7268b7efaaae1f6388b2
font_01_sfnt_off00012b9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B9F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000143b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143B6 10944 bytes
SHA-256: d75ae49d9e1f01e45dc056c77de5685fa0ac501b62a6943cfe3b181d0fa837a7

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