Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3b072deaeacaab1…

MALICIOUS

PDF

75.0 KB Created: 2021-03-06 22:06:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d22ceefc743691839c7125cd7ab8b35f SHA-1: eaf0ed3d723b4bbda8baa7efafb5de348ce7b712 SHA-256: a3b072deaeacaab18b86f4f123617ef1250fba6c97db72c31d4207efdc5dd621
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://dugedepap.ru/123?utm_term=words+their+way+spelling+lists+5th+grade+pdf PDF link annotation
    • https://cdn.sqhk.co/zejejofe/iajbhfD/800_words_season_4_netflix.pdfIn PDF document text
    • https://cdn.sqhk.co/dokukavifig/ZILid6B/can_ragdoll_cats_jump.pdfIn PDF document text
    • https://cdn.sqhk.co/fudixaxogub/Thdsicq/dalelano.pdfIn PDF document text
    • https://cdn.sqhk.co/dulinifijal/il39P5c/biranag.pdfIn PDF document text
    • https://cdn.sqhk.co/purorelaz/iaijhbO/birekuxodupodexusibe.pdfIn PDF document text
    • http://xuwuvewisin.mypressonline.com/epson_v370_driver_win10.pdfIn PDF document text
    • http://fopokigife.mywebcommunity.org/29880240060.pdfIn PDF document text
    • https://cdn.sqhk.co/judawube/jjhaDhj/my_flag_boy_meaning.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380229/normal_5fe7c37543ee0.pdfIn PDF document text
    • https://cdn.sqhk.co/nokotadi/BgiBjcH/80146791222.pdfIn PDF document text
    • https://cdn.sqhk.co/moxasapiwer/XignRia/28454396523.pdfIn PDF document text
    • https://cdn.sqhk.co/ragejeli/fGhih8p/man_down_season_2_episode_1_cast.pdfIn PDF document text
    • https://cdn.sqhk.co/xejudawadoni/ajboiie/repulsed_definition_example.pdfIn PDF document text
    • https://cdn.sqhk.co/litawoxelida/6ghgdgi/pole_zero_plot_impulse_response_matlab.pdfIn PDF document text
    • http://vomidujoma.scienceontheweb.net/wijegaselam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482218/normal_5fdad66fe2131.pdfIn PDF document text
    • https://cdn.sqhk.co/lanumakefu/pKbjgif/35888352966.pdfIn PDF document text
    • http://wunadimizurened.medianewsonline.com/39463850763.pdfIn PDF document text
    • https://cdn.sqhk.co/mowezeto/HaNuJgg/army_vs_zombies_games_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://peledopa.myartsonline.com/electric_motors_and_control_systems_by_frank_d._petruzella.pdfIn PDF document text
    • http://pujumek.myartsonline.com/54866532585.pdfIn PDF document text
    • http://bifiwapaz.onlinewebshop.net/husqvarna_chainsaw_235_manual.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_off0000e610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE610 5636 bytes
SHA-256: 29458832aeb379b8f2e38ecdc62735de66e1356e7c7dc706f574f1ee0c3f28cf
font_01_sfnt_off0000f95b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95B 10288 bytes
SHA-256: 2703e9394d83d3fd639feeb27c705506ac145c74057b35cc1de65d4f03185fd6

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