Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fe0c875c36b5437…

MALICIOUS

PDF

83.5 KB Created: 2021-09-13 04:14:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 045c6f6661ada9060e78efb596e35790 SHA-1: 4b7c766fce3e79eab81304d3f73aa1db583275f4 SHA-256: 1fe0c875c36b5437c59f0ef6460a08d68b17165ca8069bd32a25a2aa15bb4bcc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, a common tactic for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and the nature of the URLs suggest an intent to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://katyababash.com/images/uploads/file/kijabinimofur.pdf In PDF document text
    • http://xn--3e0b556bhrbowi6undva.com/ckupload/files/28053849231.pdfIn PDF document text
    • http://pillshop.ru/uimg/files/xudaburi.pdfIn PDF document text
    • https://sadex.pl/fck/file/60727925223.pdfIn PDF document text
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/34886025780.pdfIn PDF document text
    • http://vzwsportenmuziek.com/content_docs/dojunalofeli.pdfIn PDF document text
    • http://dichvumucin.com/upload/ckupload/files/39427130567.pdfIn PDF document text
    • http://www.andreapondika.cz/file/16362972144.pdfIn PDF document text
    • http://maekalocal.com/Maeka/UserFiles/File/61393579746.pdfIn PDF document text
    • http://affectif.ro/data/Image/file/24315911017.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/16132a6545b0b5---51897237595.pdfIn PDF document text
    • http://www.beautyvogue.ch/Files/file/55759706647.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/0d22238d4087262c1baa84135223cbde/sobujuwimurikof.pdfIn PDF document text
    • http://gimnazjum-krasiczyn.pl/img/userfiles/file/vumubapojivajedi.pdfIn PDF document text
    • http://ksiclubcom.ksiclub.org/svnprojects/DHD/Source/images/files/tefusasasatuwi.pdfIn PDF document text
    • http://sakuragiramenandsushi.com/uploads/files/76896246615.pdfIn PDF document text
    • http://poorclarescork.ie/images/zakalorutigufode.pdfIn PDF document text
    • https://pvesc.vn/uploaded/file/xesowab.pdfIn PDF document text
    • http://www.smwiarus.pl/ckfinder/userfiles/files/modawinoxovalukiti.pdfIn PDF document text
    • http://charivne.info/images/file/56396474816.pdfIn PDF document text
    • http://protok.pro/upload/files/85796714930.pdfIn PDF document text
    • http://imobiliariaimperio.com/files/files/25927008358.pdfIn PDF document text
    • https://dudikom.pl/userfiles/file/susimatok.pdfIn PDF document text
    • https://clubkdo.fr/img/pics/files/jafekopukuvikoturatu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=cara+download+video+di+website+lewat+androidPDF 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_off0000e3ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AC 17256 bytes
SHA-256: 733589a4b70e05cb81d75f781206293339dbf0fb3a84d23a04b9e0daa64b06bf
font_01_sfnt_off00010fe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE1 10564 bytes
SHA-256: 885bc5a609e3987bf7834a23608855b464e6a8fcd6e52d759088ed93920898a3
font_02_sfnt_off00012829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12829 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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