Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e337e47a67af66d…

MALICIOUS

PDF

74.9 KB Created: 2021-09-17 07:49:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 990598167faaf6fdd1c61153aa084be5 SHA-1: 121ec3faefc9b0914deb69d5a7ae5e1cdf89974e SHA-256: 3e337e47a67af66df59209e71699a0ce8615ccb4f8cd17cdde55f294a28a7e61
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, indicating it's designed to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of numerous external links, many hosted on disposable domains, further supports a link-farm or phishing lure strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://pixomot.ru/uplcv?utm_term=how+to+draw+on+pdf+windows PDF link annotation
    • http://centroolosprato.it/userfiles/files/tijotivelepumale.pdfIn PDF document text
    • http://stringquartet.biz/web/images/fck/file/zoravotigubarudutevaka.pdfIn PDF document text
    • https://wineuniverse.us/userfiles/file/49557704415.pdfIn PDF document text
    • http://studiopiergentili.it/userfiles/files/monofuzorumurafusot.pdfIn PDF document text
    • http://abarappresentanze.it/userfiles/files/39185046026.pdfIn PDF document text
    • http://nage-z.com/ckfinder/userfiles/files/14514512464.pdfIn PDF document text
    • http://www.eurosecurimed.com/ckfinder/userfiles/files/50424393054.pdfIn PDF document text
    • http://turar-mussin.com/userfiles/File/rixiwa.pdfIn PDF document text
    • http://france-ex.com/images/blog/file/72624646120.pdfIn PDF document text
    • http://geojeoceanhotel.com/userfiles/file/20210917102759.pdfIn PDF document text
    • http://vuatoyen.com/uploads/userfiles/file/32323297679.pdfIn PDF document text
    • https://agronlogistics.com/userfiles/files/kefewekatovezu.pdfIn PDF document text
    • https://u-spot.biz/js/ckfinder/userfiles/files/33406925595.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/nanaredufuzufobebawenagun.pdfIn PDF document text
    • http://mamaskitchenorder.com/uploads/files/jiwojejolefiwet.pdfIn PDF document text
    • http://baugeraeteverleih.de/benutzerdateien/jotizogate.pdfIn PDF document text
    • http://djk-winkel.de/images/uploads/file/kajatotinorido.pdfIn PDF document text
    • http://jtravel.clickis.kr/FileData/ckfinder/files/20210906_D000662F2128F763.pdfIn PDF document text
    • http://cs-web-design.de/ablage/userfiles/files/tujisepumidef.pdfIn PDF document text
    • https://b2bircruise.travflex.com/bot/ckfinder/uf/files/masazomerazugodudurag.pdfIn PDF document text
    • http://vagtteam.com/userfiles/Files/72881553148.pdfIn PDF document text
    • https://confidence-ist.mktechsol.com/ckfinder/userfiles/files/dedajuvugin.pdfIn PDF document text
    • http://bctlorraine.org/userfiles/file/ritumewejafewize.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_off0000c42c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC42C 16668 bytes
SHA-256: 3eb22aacb4066b00710cd30dc5a804c8088ed66864681b7c4691a5bbfc21f735
font_01_sfnt_off0000eef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001070d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1070D 10392 bytes
SHA-256: 40535c9859fd706dd1ac6fde886593586e15188ea02e2b5e4ebbee7049a9593e

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