Malicious PDF — malware analysis report

Static analysis result for SHA-256 90078a689f46f713…

MALICIOUS

PDF

73.7 KB Created: 2021-09-14 04:26:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 94631934678eab8f59cf792746c8aebd SHA-1: e8fb571623024844d30f2628ff8b341ec6a274c3 SHA-256: 90078a689f46f7139992dcff20451d2fec83ba81a5dc32deab119f49457fe4b5
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://nomylo.ru/uplcv?utm_term=delete+old+text+messages+android PDF link annotation
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613176080a362---kebinejixidolewanasa.pdfIn PDF document text
    • http://es-manzokudou.com/yamituki-n/uploads/files/kuneni.pdfIn PDF document text
    • http://cafesezony.ru/fck_editor_files/files/14741661282.pdfIn PDF document text
    • http://autokolcsonzoszolnok.hu/admin/fck_upload/file/64900791619.pdfIn PDF document text
    • https://nutritie-metabolism-sanatate.ro/app/webroot/files/userfiles/files/vidulegibemuzabudurinago.pdfIn PDF document text
    • https://mar3ol.com/Files/files/gimaxoridowoxure.pdfIn PDF document text
    • https://voziky-paletove.cz/mctree.cz/pictures/other/files/44857017677.pdfIn PDF document text
    • https://nhahangphongcanh.com/uploads/files/bigivizinekitape.pdfIn PDF document text
    • http://tortsurprise.ru/upload/redactor/files/bababepeloj.pdfIn PDF document text
    • https://izr.fr/files/xegoxo.pdfIn PDF document text
    • http://chinasoftcore.com/userfiles/file///631996884.pdfIn PDF document text
    • http://linuxnewyork.com/draft/media/29047600716.pdfIn PDF document text
    • http://modnyi-buket.ru/uploads/files/gerawezu.pdfIn PDF document text
    • http://nanopena.cz/upload/file/63946483324.pdfIn PDF document text
    • http://geyikkimya.com/userfiles/upload/file/29747888708.pdfIn PDF document text
    • http://moonlightmontessori.com/upload/files/biferena.pdfIn PDF document text
    • https://brianhigbielaw.com/UserFiles/file/47160474530.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613fedad8179c---sibenefumemefunememin.pdfIn PDF document text
    • http://amandamaitland.com/images/file/rikafapemaxirutodagegero.pdfIn PDF document text
    • https://shih-tzu.ro/files/file/vosep.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD1E 10696 bytes
SHA-256: 6a6c3555837eaff5eaba110e75d85639c7a859b0f77c18ebea0e60db87573ac4
font_01_sfnt_off0000d56b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD56B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ed7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED7D 17400 bytes
SHA-256: 330731f6088ebf71016b4b9fe17de9d206653dc677b7fbfe05503448796a7bb6

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