Malicious PDF — malware analysis report

Static analysis result for SHA-256 69d0b80a047cae9e…

MALICIOUS

PDF

78.8 KB Created: 2021-09-18 15:51:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 13188d4da3afd796a0640b1713a6afc0 SHA-1: fb8a86236e5e1ffaf898ac4295fbbf14cc7980e0 SHA-256: 69d0b80a047cae9e0ec6941d5ea0ec703284b24fb0dcd53d09254d78d47fbe0a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it is designed to redirect users to potentially malicious websites, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pistant.ru/uplcv?utm_term=comics+and+sequential+art+pdf PDF link annotation
    • https://safetyhanoi.com/userfiles/file/84807081202.pdfIn PDF document text
    • http://toyotarent.hk/FileData/ckfinder/files/20210909_C02E483F35368346.pdfIn PDF document text
    • http://helder-effect.nl/userfiles/file/37457895094.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/16143dc04e1f3d---sikaxogiwoxos.pdfIn PDF document text
    • https://aymsoft.us/aym_image/files/beredelirivumifanusevi.pdfIn PDF document text
    • https://igruppe.no/ckfinder/userfiles/files/1164567355.pdfIn PDF document text
    • http://lighthouse-connection.at/myPix/file/jabimik.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user//file/_0475032001631542968.pdfIn PDF document text
    • https://iword.de/userfiles/file/fokijovafuvagilazajopim.pdfIn PDF document text
    • http://hzbmsj.net/images/upload/File/sadaxoluvajelaginiregadeb.pdfIn PDF document text
    • http://chemicalengineers.ie/images/65929475576.pdfIn PDF document text
    • http://cosmikkino.ru/sadm_files/93392130501.pdfIn PDF document text
    • https://tsydesign.com/userfiles/jws/files/50708469712.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210911091800_1483677916.pdfIn PDF document text
    • http://embody.box8websites.com/ckfinder/userfiles/files/87620757748.pdfIn PDF document text
    • https://gimenezricarte-deltabogados.com/ckfinder/userfiles/files/jewiguxoparamakexuja.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/iikqminfrim8taeervoq4cf692/xazukazevezikafef.pdfIn PDF document text
    • http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/97244827003.pdfIn PDF document text
    • http://trustarshida.co/cache/fck_files/file/88198878182.pdfIn PDF document text
    • http://onlinevay.com/upload/files/verelikekizakebuses.pdfIn PDF document text
    • http://jfe.hk/userfiles/buxorusiroluguzofojaput.pdfIn PDF document text
    • https://martan.es/cenavarra_userfiles/files/zukirupopel.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_off0000cf66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF66 17660 bytes
SHA-256: 3c4f7371393c444e21e3279b0727574c7d0383df6cd4eb93902c41cb9d34ce76
font_01_sfnt_off0000fc88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC88 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001149f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1149F 11056 bytes
SHA-256: 4a1ee6b05a5d895c6276780cbda4050215a5ca17eefb7ccad7fb534b17c0c177

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