Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0ad7841751c3431…

MALICIOUS

PDF

78.1 KB Created: 2021-04-05 18:11:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d13d99199adf98631481422121190e37 SHA-1: 07c11d5cf153be033b59bdf36e14ef66035dcd2a SHA-256: e0ad7841751c34318325ee44d8dd3dbf24c3153c3e769f2d51cb80917cd5b598
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 0.9996

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://lozipotod.ru/wix?keyword=burton+guster+names PDF link annotation
    • http://xijipeva.mypressonline.com/7870626439.pdfIn PDF document text
    • http://sinomefonok.mywebcommunity.org/gidamejedi.pdfIn PDF document text
    • http://mjawebdesign.net/beyonce_platinum_edition_download_zipoesuq.pdfIn PDF document text
    • http://appeal-ig.com/4292005103q92up.pdfIn PDF document text
    • http://goladelexugezi.sportsontheweb.net/mugefovifumumi.pdfIn PDF document text
    • http://ribadubeko.scienceontheweb.net/3150973377.pdfIn PDF document text
    • http://zootime.store/95924077455oozeo.pdfIn PDF document text
    • http://jedomagisuw.getenjoyment.net/como_cambiar_un_archivo_de_a_word_en_mac.pdfIn PDF document text
    • http://wurilozi.scienceontheweb.net/best_pimp_rappers.pdfIn PDF document text
    • http://itravelgr.com/77324043230slaez.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bb491b24-4c81-4ccc-8daa-bf1baeb171c2.filesusr.com/ugd/93c935_eb33973041544cbe9462e81f6494bb12.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jawusawar/bitlife_fame_update_android.pdfIn PDF document text
    • http://bufijonewufo.onlinewebshop.net/balunoxopaw.pdfIn PDF document text
    • https://e5acd528-9925-4355-98ed-6c6122c9c19a.filesusr.com/ugd/49fecd_54d7162d42c14e1fb4c32114eb37fe28.pdf?index=trueIn PDF document text
    • http://raxegujanamefas.atwebpages.com/kowefezeliwumitoke.pdfIn PDF document text
    • http://nosigegu.onlinewebshop.net/zaguwutalonagewudug.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/relative_pronouns_worksheet.pdfIn PDF document text
    • https://f74ea38a-ab8d-49a0-8d31-9a1d7ce64423.filesusr.com/ugd/5ceade_8accf47a8a4941c7a0a47fa21224fd55.pdf?index=trueIn PDF document text
    • https://f110cc6a-49d6-427c-9ab6-a3a4d323b004.filesusr.com/ugd/9e53d4_37485690b23348a2b9ac88a739487530.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/xivuzulepofimow.pdfIn PDF document text
    • http://goxafebo.myartsonline.com/22837404904.pdfIn PDF document text
    • http://liduvitulugug.onlinewebshop.net/kidurododegukusew.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DB 5020 bytes
SHA-256: f86f5bab4cdbfec0d872f13f97c297b02643a6aba2d728433322a88f2e7ff4b3
font_01_sfnt_off000103df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DF 11284 bytes
SHA-256: 2ccdbfbb95b4e9652bb1e68b846f6b21b7f8bdcf7cbc7913a3aa9a3d2b217b88

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