Malicious PDF — malware analysis report

Static analysis result for SHA-256 08702a899ddaf69a…

MALICIOUS

PDF

69.5 KB Created: 2021-09-28 07:21:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ece8062664ddbd243c7d268b1d8b029c SHA-1: 80bdbca66f57aa028424bf62f1d3e83f2d78e87e SHA-256: 08702a899ddaf69a41f675178d481a90036f61129e8ae28a97d51605fa950357
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous distinct hosts and disposable URLs, suggesting an attempt to direct users to malicious content. The presence of many unknown reputation URLs further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://himarco.ir/basefile/himarcoir/files/74375289680.pdf In PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/c31ca3cdfd13067d8042e51fc00a0a63/wojixebixi.pdfIn PDF document text
    • https://ags-car.com/upload/files/dapigafosinopoguvejo.pdfIn PDF document text
    • https://www.alugutader.fr/ckfinder/userfiles/files/menalina.pdfIn PDF document text
    • http://benrassam.com/uploads/files/80738540409.pdfIn PDF document text
    • http://topbondtape.com/uploadss/file/72948605098.pdfIn PDF document text
    • http://hum-lucknow.org/test/fckeditor/file/2671894482.pdfIn PDF document text
    • http://inteko-tula.ru/f/file/82318067876.pdfIn PDF document text
    • http://js-space.de/userfiles/file/57237165286.pdfIn PDF document text
    • http://malopolskiszlakwinny.pl/upload/File/zijumogamesobovow.pdfIn PDF document text
    • http://pascalparrot.com/uploads/assets/file/9196314560.pdfIn PDF document text
    • https://vmwarts.com/ecovic/file/leruvori.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/6b23265c6e590997c85edcd7afbbbb74/1515820669.pdfIn PDF document text
    • http://www.gonouvellezelande.com/files/vixoguwolawikagajik.pdfIn PDF document text
    • https://biholka.cz/uploades/userfiles/file/1980751381.pdfIn PDF document text
    • https://spbmworld.com/anaeter_capital/siteadmin/userfiles/files/92536426057.pdfIn PDF document text
    • http://www.texaco.bargiel.com.pl/ckfinder/userfiles/files/nozikaloveputukeg.pdfIn PDF document text
    • https://www.renfrewareahealthvillage.ca/ckfinder/userfiles/files/80017991136.pdfIn PDF document text
    • http://youngthisyear.com/ckfinder/userfiles/files/jozigunutapipizijad.pdfIn PDF document text
    • http://aven.su/userfiles/file/bomevizavitajed.pdfIn PDF document text
    • http://kxqcgs.net/filespath/files/20210923190838.pdfIn PDF document text
    • https://euroquimicadistribucion.com/zabaleta/data/imagenes_contenidos/file/41866022957.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=extremely+loud+%26+incredibly+close+pdfPDF 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_off0000afb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFB8 10180 bytes
SHA-256: e58e0554bae2ec44f998b0c6806ef8a325fac48832e5d33eb1839ce8c156bd8d
font_01_sfnt_off0000c692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC692 16556 bytes
SHA-256: 9bb0e35f708a683ba6a6549694823f2f7d042d9ddab5d8ec9d26f315ceb191bc
font_02_sfnt_off0000f09b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF09B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1