Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b1eeebca455c9fb…

MALICIOUS

PDF

69.3 KB Created: 2021-09-16 03:54:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 3279c8ddc2a8d829d715b518db75d72b SHA-1: 185a3b14ec5a3baa14ea5089c67be5948ffae296 SHA-256: 0b1eeebca455c9fb5e0162f57be38c1f09890d2463b6d96cfa680accff46cbc9
134 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect the user to malicious sites. ClamAV and ML classifiers confirm its malicious nature, flagging it as a phishing trojan. The presence of JavaScript suggests it may be used to exploit vulnerabilities or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://stka.gr/ckfinder/userfiles/files/varopusulogejixadobakikok.pdf In PDF document text
    • http://ageddfjtjgrade.pretty-match.com/upload/files/56580150221.pdfIn PDF document text
    • http://granitemountainranch.net/userimages/jeduwukowatobux.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/lejekokiforoneseza.pdfIn PDF document text
    • https://artistaone.co/userfiles/files/2261241072.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/pivedukikitebed.pdfIn PDF document text
    • http://alotercuman.com/ckfinder/userfiles/files/6757256645.pdfIn PDF document text
    • http://collectifff.be/imgdb/accueil/files/nudevakisibusakuxejivebi.pdfIn PDF document text
    • http://fitviewer.info/files/file/69007800090.pdfIn PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/91072153398.pdfIn PDF document text
    • https://alicantea.centralcms.cloud/galeria/files/10457701137.pdfIn PDF document text
    • http://tks-forever.com/upload/2021/09/14/file/76444358776.pdfIn PDF document text
    • http://anabakorea.jp/userfiles/file/potawolamivolobuwiwupaf.pdfIn PDF document text
    • http://gocoachfox.com/userfiles/file/gedodifakapo.pdfIn PDF document text
    • http://jcbcharpentebois.com/ressource/site-image/files/tuvafejevufog.pdfIn PDF document text
    • http://kaztelcom.kz/ckfinder/userfiles/files/linak.pdfIn PDF document text
    • https://egyseg.eu/ckfinder/userfiles/files/16343542080.pdfIn PDF document text
    • http://lt101shop.com/userfiles/files/42532859980.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/rikerofivow.pdfIn PDF document text
    • http://mmbassisiprovince.in/files/js/ckfinder/userfiles/files/68585632961.pdfIn PDF document text
    • http://paradisoseminatrici.it/userfiles/files/zugesegev.pdfIn PDF document text
    • http://fst-uinsu.net/userfiles/files/bowamutaro.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=roblox+apk+freePDF link annotation
    • https://www.posluh.hr/ckfinder/userfiles/files/jepale.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_off0000b292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB292 15464 bytes
SHA-256: fef80d71d59b4bcf900d479bafabab7c55cca83071a5fa692abec689e021275b
font_01_sfnt_off0000d917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD917 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f12e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12E 10268 bytes
SHA-256: bf5e0a37e86f7c239ec9dbabce76c599c69fc60e85b385c2486356c119621af3

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