Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dd202eb53a116b6…

MALICIOUS

PDF

86.8 KB Created: 2021-09-18 03:13:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5e8d45783154313a8365facd2fdcdc00 SHA-1: a868ccfe2e858fd787a97198f137eab4060254ce SHA-256: 6dd202eb53a116b6462e887a4e05afd6846731874d83d03da07d613d27af8c08
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating embedded JavaScript and a large number of external URIs. The PDF acts as a link farm, directing users to various domains, suggesting a phishing or malware distribution attempt. The embedded JavaScript likely facilitates the redirection or further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://infrive.ru/uplcv?utm_term=transporting+fridges+on+their+side PDF link annotation
    • http://motoren-adachi.com/js/upload/files/vurepaj.pdfIn PDF document text
    • https://zhongzing.com/uploads/files/202109062200002415.pdfIn PDF document text
    • https://alrashed-alsaleh.com/userfiles/files/96182842465.pdfIn PDF document text
    • http://drironcat.com/images/file/ribomomenujikojuzakujazo.pdfIn PDF document text
    • https://akrmedia.no/ckfinder/userfiles/files/nepajetogopojavofazo.pdfIn PDF document text
    • https://ud-hobby.com/images/Upload/file/zidozelukevugax.pdfIn PDF document text
    • https://adrfarysz.pl/userfiles/file/83155084906.pdfIn PDF document text
    • http://panteres.com/files/files/47400525312.pdfIn PDF document text
    • http://ms-krmelin.cz/app/webroot/files/files/fozubekafukozabenog.pdfIn PDF document text
    • https://newshieldinsurance.com/demo/gsa/final/images/file/66064509996.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/292277866.pdfIn PDF document text
    • http://studiotecnicobergamaschi.it/userfiles/files/famuxele.pdfIn PDF document text
    • https://autoradiator.mn/uploads/ckfinder/files/72231685355.pdfIn PDF document text
    • http://mediasingrid.com/js/new/fckeditor/userfiles/file/25107708749.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/dokopuruwawiraburofu.pdfIn PDF document text
    • http://botaierpharm.com/upload/files/50545368623.pdfIn PDF document text
    • http://ephtour.com/FileData/ckfinder/files/20210914_E27F2B196DE4FB89.pdfIn PDF document text
    • http://ecovn.vn/uploads/news_file/43604844116.pdfIn PDF document text
    • https://bengalroys.com/ckfinder/userfiles/files/jufusuzozirabemesofelok.pdfIn PDF document text
    • http://btfa.tw/upload/files/95086510656.pdfIn PDF document text
    • http://dallard.fr/ressource/site-image/files/dabezuwesipigiv.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/35066131988.pdfIn PDF document text
    • http://lindendirect.com/tempimg/file/45012505456.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_off0000ef99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF99 17596 bytes
SHA-256: 3700818bc1110bc50aed25d7ac1c4c1df0f7c776eceea7482b39a0fc4e6bc65d
font_01_sfnt_off00011cd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD6 10696 bytes
SHA-256: a8729ba3f0de71c563a84cffadf9b33183b1cfa68c6832000b15a597e6dcf422
font_02_sfnt_off0001351b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1351B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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