Malicious PDF — malware analysis report

Static analysis result for SHA-256 faa88ac601c6f41a…

MALICIOUS

PDF

102.1 KB Created: 2021-04-03 01:46:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 3e5053ad378216a35a115f0b7dea3232 SHA-1: 571e8435fccfafef13f162171bd8b08aad61f891 SHA-256: faa88ac601c6f41aea8b33ffb45e7e4a54830e0595e528b70aba87a8ec7b7610
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9994

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://maypoin.ru/award?keyword=un+cadaver+exquisito+libro+pdf PDF link annotation
    • http://reduslim-shopofficial.site/playing_card_club_symbolhibtb.pdfIn PDF document text
    • http://differencecheats.net/sword_art_online_progressive_anime_releasexxpwn.pdfIn PDF document text
    • http://rowowevu.mypressonline.com/lexupan.pdfIn PDF document text
    • http://winfreeiphone.xyz/zavevifigew4lx.pdfIn PDF document text
    • http://on24-system.club/42195042362kad9p.pdfIn PDF document text
    • http://losqutoq.online/carta_de_verificacion_de_empleo_ejemplofsdsk.pdfIn PDF document text
    • http://fitness1.space/33756707967srbxx.pdfIn PDF document text
    • http://tapopapebesawu.getenjoyment.net/lijufel.pdfIn PDF document text
    • http://yewes.fun/denon_avr_x4200w91426.pdfIn PDF document text
    • http://viewcreditscore.info/honda_civic_2006_secret_menudms8k.pdfIn PDF document text
    • http://grusha.space/83410562790xjfg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8a927cb-086e-4257-8462-a2a9965f9ffd/a_court_of_mist_and_fury_espaol.pdfIn PDF document text
    • https://cb70cc59-2297-49c3-b7e2-2ac7e26e28d4.filesusr.com/ugd/4479ed_bcc804ff6a004727be8fd126ea632779.pdf?index=trueIn PDF document text
    • https://cd8fad78-6a19-43c6-878c-830d169ee42d.filesusr.com/ugd/ff0d91_b676947ddd3c425b8c207eedbe48c562.pdf?index=trueIn PDF document text
    • https://a79fbd7c-12a6-44fe-9d3c-43dc2b0795a8.filesusr.com/ugd/f95141_ec113bfc7a4544a4b6ca744a46f30e18.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/wuwopas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/015e8c36-7671-4a4c-82ca-9f5660d74a60/mojiw.pdfIn PDF document text
    • https://a35aa970-3e4e-4c20-be1f-53d10001bce9.filesusr.com/ugd/af4e73_356fe2fe27ff4fc688ed9fa15ca74d60.pdf?index=trueIn PDF document text
    • http://badamowafe.onlinewebshop.net/57776226687.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/wigabufu.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/23324120547.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/hlp_46_hydraulic_oil_data_sheet.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
    • 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_off00013034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13034 5536 bytes
SHA-256: 9dc8d1c72a5e26af07d4646af36f8cb8c1897a375bb2a3c9f4207dae7570401b
font_01_sfnt_off00014318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14318 14104 bytes
SHA-256: 970328cd69a807839904242cf20472214c9de74d9dcf1d430b42e7a00ffa3cfc
font_02_sfnt_off00016faf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FAF 17416 bytes
SHA-256: 93c4bc1797130d28072f359a2201e2adb22517aad1038d4cda578e09a9573add

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