Malicious PDF — malware analysis report

Static analysis result for SHA-256 b01332cd516bc029…

MALICIOUS

PDF

74.7 KB Created: 2021-04-09 01:42:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 993611738fc2fdeead951ce2f813704c SHA-1: 9a20308525d3e6a546d15d92953139bc9a4546ef SHA-256: b01332cd516bc029e489864bf20eef514401c7f9ebedf17c568c50d7c8123905
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 0.9997

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://golowaki.ru/strik?utm_term=acer+laptop+price PDF link annotation
    • http://nout-sale.site/gifole5mclz.pdfIn PDF document text
    • http://filemarker.store/what_instrument_is_used_to_measure_temperature_of_the_atmosphere2bl3z.pdfIn PDF document text
    • http://universityru.fun/icy_veins_fury_warrior_pvp_guidedbwgo.pdfIn PDF document text
    • http://damvglaz6.xyz/carol_of_the_bells_sheet_pianouqxmk.pdfIn PDF document text
    • http://wisumezuj.22web.org/guitar_techniques_magazine_lesson_index.pdfIn PDF document text
    • http://forpost-electrica.ru/zadefubukutudutawoyf0m0.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/0d675994-9811-4cff-ac88-606fa697801e/how_to_reset_samsung_sdr-b74301n.pdfIn PDF document text
    • https://8b83d164-5e56-46cc-b941-48f48810ddf3.filesusr.com/ugd/76ce43_0a98d3ddbbe145299e016283fb7dec4d.pdf?index=trueIn PDF document text
    • http://gusutawidike.epizy.com/refovibujiwifot.pdfIn PDF document text
    • http://gobusef.rf.gd/kisaxowisofepemabipuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/037193d0-02bb-494d-ba72-bb9aca1fe6ce/59573975353.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9adf49e1-dc5d-4b1b-8c90-85bea4c698b4/how_to_connect_my_bose_bluetooth_headphones_to_my_tv.pdfIn PDF document text
    • http://kiwaxebaka.rf.gd/proyectos_de_robotica_para_nios.pdfIn PDF document text
    • http://balubusepebibi.rf.gd/75001098274.pdfIn PDF document text
    • https://b1c30c75-ab46-439a-884d-3836ae4b8a49.filesusr.com/ugd/2d1648_efc109a227334791915e071e8dc5a8fd.pdf?index=trueIn PDF document text
    • http://xatoveg.epizy.com/temperamentos_transformados_download_gratis.pdfIn PDF document text
    • https://724418e0-3ace-43c1-abd8-628b4820fc71.filesusr.com/ugd/6df952_1d1ff025daca43b5b02ecb2d9e60c880.pdf?index=trueIn PDF document text
    • https://7afcd0b8-98df-42a4-afe0-9544d44c9539.filesusr.com/ugd/74e9cf_0f9455c9960c4c48a82b74384027c181.pdf?index=trueIn PDF document text
    • https://c07b3cb0-7d4a-4e65-9c62-eb3bd0ce3b6b.filesusr.com/ugd/7560d5_7190bd1dfd444cedb5335250fcca537c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e83584fc-0ce1-42f1-b123-0ff467aab030/70538216982.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_off0000e8ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EF 4736 bytes
SHA-256: 12129a61b1e0370ed747eebc381553b62781b585f7c4e54a77ddebe83ed0920a
font_01_sfnt_off0000f91d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF91D 10908 bytes
SHA-256: 780efcbec4821afc90b36748208d0426739d02cfaade74325c1d632f0c35febf

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