Malicious PDF — malware analysis report

Static analysis result for SHA-256 62d76fb2aaed606c…

MALICIOUS

PDF

96.4 KB Created: 2021-03-25 05:47:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3be70fa822730a9ab6b4e7358e4e199c SHA-1: 595c33bf95cd3ac6e737657eaaf899b7a6fbe15a SHA-256: 62d76fb2aaed606ccf1fd440d0b3f8f8dc668e75c65e99f217a5c4a077669f77
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gimoguvi.ru/strik?utm_term=avatar+the+last+airbender+the+search+part+3+pdf+download PDF link annotation
    • https://cdn.sqhk.co/lekibapufe/ggfig8k/old_game_show_tic_tac_toe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416654/normal_603d03fc5c33c.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/psYhfrL/microsoft_to-_do_list_task_reminder.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384037/normal_60546c69e0b51.pdfIn PDF document text
    • https://gulekikafosevog.weebly.com/uploads/1/3/2/3/132303175/jezavinadesolu_ruvege_xopajavif_loguleribasu.pdfIn PDF document text
    • https://wasavegod.weebly.com/uploads/1/3/4/5/134589575/f96ca39c558.pdfIn PDF document text
    • https://cdn.sqhk.co/voxoduvi/jaKhfjf/ben_10_up_to_speed_mod_apk_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/ripalufix/hghgfii/jijivosaxad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387815/normal_6046774090cbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483365/normal_60592924413b0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kegoxakalebow.rf.gd/95327352756.pdfIn PDF document text
    • https://cd753cf5-d90a-4073-9c55-931a76e81761.filesusr.com/ugd/8826df_15148578c9f04cfc94e7bbe3ccc26d23.pdf?index=trueIn PDF document text
    • https://8cff94d3-ecab-4ea5-ad27-d3e67d02fd32.filesusr.com/ugd/2813e2_ecfdcabd89374e869bc6158d1af28a9d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/vurupafedoma.pdfIn PDF document text
    • https://f395d2f2-f939-483b-815f-81062d4747ff.filesusr.com/ugd/be2697_2934a4d4f99f421e81e5ab89285b7459.pdf?index=trueIn PDF document text
    • https://492f55f4-3442-4b37-b17e-39d9f2f0ae8a.filesusr.com/ugd/7dfe85_e1f4134744ce4b3faa390b1fdd7408c1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/attack_on_titan_manga_vs_anime_season_3.pdfIn PDF document text
    • http://dovanokeji.epizy.com/game_escape_from_chernobyl_apk_data.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/bose_acoustimass_15_home_theater_speaker_system.pdfIn PDF document text
    • https://92ddf5cc-4ce7-4caf-b117-8241c553a727.filesusr.com/ugd/42bae0_046ae8040d8e4db1a4b4b5951542e0a0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/liguwubore/68310065571.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_off00013b13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B13 5688 bytes
SHA-256: 7dc5d05f8a792ccf05d5ae5dbf6cc9190b133f17a719ab83c43973e31d83ca4a
font_01_sfnt_off00014e7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E7C 10976 bytes
SHA-256: 9d307af124582a5065dc0b80f32bf6a49cf444b357e7b966c13fd3523d12f8a2

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