Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f0c60616bd46828…

MALICIOUS

PDF

75.8 KB Created: 2021-03-11 05:06:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6bada137f674854a2119689f6bf9ce74 SHA-1: 9874e64778a054ef1cd243e1b5d0d26bc9e835a4 SHA-256: 5f0c60616bd4682849798cff1dbe70f11110c7b840e30a4b0abe45388c8df42b
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 0.9996

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://botokaw.ru/award?keyword=bewitched+and+bewildered+book+1+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4370063/normal_6007d0407c504.pdfIn PDF document text
    • https://cdn.sqhk.co/fefowofuk/a6Ghhjb/gabosoduvatoxonikudanobe.pdfIn PDF document text
    • http://bestplacefor.rest/feuille_dheure_mensuelle_viergecnktz.pdfIn PDF document text
    • https://cdn.sqhk.co/kunimoxifagi/ihdKZa9/flame_hero_mod_apk_free_download.pdfIn PDF document text
    • http://draiwenstore.online/skyrim_with_friends_like_these_reddit4lbfm.pdfIn PDF document text
    • http://axacheat4.xyz/como_es_el_pase_elite_de_noviembre_2020z05y1.pdfIn PDF document text
    • https://cdn.sqhk.co/fugutexifi/iLggABC/wupabarajekifije.pdfIn PDF document text
    • https://cdn.sqhk.co/povewepalu/WF8ggtZ/extreme_mountain_bike_riding.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388416/normal_5fded14e2c0e4.pdfIn PDF document text
    • http://mx50off.pro/are_nfpa_codes_mandatory918ut.pdfIn PDF document text
    • http://uscarinsurance.info/what_is_the_meaning_of_quran_sharif1eyxz.pdfIn PDF document text
    • http://praktika-ingenieur.com/top_10_best_forex_trading_strategiesunfaf.pdfIn PDF document text
    • https://cdn.sqhk.co/zevolazezag/idLibid/pikaxi.pdfIn PDF document text
    • http://zirirukefup.22web.org/92781123762.pdfIn PDF document text
    • https://cdn.sqhk.co/legusovej/edjjggd/zegovuribuxu.pdfIn PDF document text
    • https://cdn.sqhk.co/rijomawonuj/gcgfigJ/download_vitalsource_bookshelf_to.pdfIn PDF document text
    • http://sozerujodurepef.22web.org/nitecore_i4_instructions.pdfIn PDF document text
    • http://yognat.space/10851663388cm2fh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://merawaboz.epizy.com/26938073568.pdfIn PDF document text
    • http://jamotawopoxagu.rf.gd/bioethics_a_nursing_perspective_free.pdfIn PDF document text
    • http://tinatuvarisofat.epizy.com/lusejasoverewinuzirigariv.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_off0000eb71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB71 5464 bytes
SHA-256: cdd12da81f23df5a991b37a5600811448360f0b9029baea20eac8044d47e27a3
font_01_sfnt_off0000fe10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE10 10396 bytes
SHA-256: 81f5b924f793cfc4a9b52904a87ddf6d98dedd5b8da0e46645b1cb7cb3c16da2

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