Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9c0d577ea6e5c9f…

MALICIOUS

PDF

86.2 KB Created: 2021-09-24 09:47:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7276231b1b08daea9824c93aa20f3258 SHA-1: d570c263df8dc26d3c3511786a97188463bf5bf2 SHA-256: d9c0d577ea6e5c9fffc508264f9992fb7739168ce1ec09ae32c0155087b306eb
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains a large number of embedded URLs, many of which point to disposable hosting or link farms, indicating a probable phishing or malware distribution scheme. No scripts were extracted, but the presence of numerous external links suggests the document's primary purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://garglob.ru/uplcv?utm_term=how+to+get+the+gun+gun+in+borderlands+3 PDF link annotation
    • https://laps.pl/userfiles/file/zotetosofoku.pdfIn PDF document text
    • http://zulassungsdienst4you.de/bilder/file/bogimisunubivokoredegak.pdfIn PDF document text
    • http://bezpiecznamlodosc.org/files/file/46667238034.pdfIn PDF document text
    • http://sung1.com/upload/files/fiteniraluzep.pdfIn PDF document text
    • http://yotlist.com/uniformkontakt/userfiles/image/files/topegafajaseresu.pdfIn PDF document text
    • http://rulada.by/upload/editor/files/wowumazaxelek.pdfIn PDF document text
    • http://areawifi.com/DESARROLLO/userfiles/files/patakomamiritugixogibole.pdfIn PDF document text
    • https://istocdukkan.com/userfiles/files/54200282879.pdfIn PDF document text
    • http://bronnicy.inhome360.ru/admin/ckfinder/userfiles/files/2953949802.pdfIn PDF document text
    • http://hzbmsj.net/images/upload/File/98618490508.pdfIn PDF document text
    • http://kanoonkaraj.ir/dbmanager/filebank/htmlgallery/file///vamanajozivexat.pdfIn PDF document text
    • https://eurosan.pl/user_images/file/woxigeludotezefosifas.pdfIn PDF document text
    • http://travelci.ru/ckfinder/userfiles/files/todobigibujo.pdfIn PDF document text
    • http://biemmecommerciale.eu/userfiles/files/ninowaw.pdfIn PDF document text
    • http://muabannhagiare.net/images/uploads/files/12026489589.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f266ff09fd---98606050937.pdfIn PDF document text
    • https://adminico.nl/userfiles/file/foriroduwapivubagije.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/161494e9ec2516---jabewelanawitifudo.pdfIn PDF document text
    • http://jamalcar.com/userfiles/file/34795540214.pdfIn PDF document text
    • https://saigonservices.vn/images/uploads/files/9984088340.pdfIn PDF document text
    • http://tantex.org/tantex/tantexuserfiles/file/58994274417.pdfIn PDF document text
    • http://www.smartusb.info/images/library/File/widaribe.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_off0000e9ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CA 11016 bytes
SHA-256: 805a8f3d17c7940aaa77ba68bc27b5ef09230ad4e358dda8d4351d29ff748685
font_01_sfnt_off00010327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10327 18720 bytes
SHA-256: 44f36b98418e644f6b06af86ff31fdc14c58b253a0f69608197d424b12f8a844
font_02_sfnt_off00013397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13397 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1