Malicious PDF — malware analysis report

Static analysis result for SHA-256 20f7428ee7f5fddc…

MALICIOUS

PDF

80.9 KB Created: 2021-05-12 02:34:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: d67d911cbd9087a006f2e91b5fa96fc5 SHA-1: d3502f5f1e063e3f5fbcaf96b4747643dd0dd3d3 SHA-256: 20f7428ee7f5fddccbf459c87838d8e19d426c6225eba5a9f3145c674b043196
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to disposable domains, suggesting a phishing or malware distribution campaign. The PDF structure and embedded links are indicative of a spearphishing attachment, designed to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://lozipotod.ru/strik?utm_term=why+is+leadership+important+in+childcare PDF link annotation
    • https://cdn.sqhk.co/vavewiren/ib9qJgh/nodupumaforo.pdfIn PDF document text
    • http://santaparker.store/delevalamupimezotufspxmf.pdfIn PDF document text
    • http://avto-document.site/chop_chop_slide_song0iepd.pdfIn PDF document text
    • http://tiktokfrance.fun/19286624631hv532.pdfIn PDF document text
    • http://opendouche.xyz/bad_days_in_us_historyf2aa3.pdfIn PDF document text
    • http://livecopyrightverification.com/cunto_dinero_se_necesita_para_abrir_una_gasolineraupca7.pdfIn PDF document text
    • http://it50disconto.pro/causation_in_history_writing8i09x.pdfIn PDF document text
    • https://cdn.sqhk.co/xexegapimuwi/gB9nUjc/western_manor_apartments.pdfIn PDF document text
    • https://cdn.sqhk.co/kinibemazoz/gihuDii/14532792673.pdfIn PDF document text
    • http://shoop-fr.ru/rozinujiparibomexid2vmg.pdfIn PDF document text
    • https://cdn.sqhk.co/mudinaxape/eZdgigf/disneyland_park_anaheim_tickets_discount.pdfIn PDF document text
    • http://swast-group.website/10.3_inscribed_angles_worksheet_answers4b9ab.pdfIn PDF document text
    • https://cdn.sqhk.co/fuzomorikat/ja9cidL/silver_dollar_city_tickets_military_discount.pdfIn PDF document text
    • http://ndfnasg.xyz/what_is_the_zip_code_for_my_location0uhx6.pdfIn PDF document text
    • http://power-guard.shop/2016_audi_a3_quattro_owners_manualyynxh.pdfIn PDF document text
    • https://cdn.sqhk.co/xogudililavo/Mjhbjby/ninja_master_of_spinjitzu_episodes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://569961a5-e6b5-462d-8b38-7193d5e7b20b.filesusr.com/ugd/a37a2e_7aad837ccf2b4e1d843330055b1c904e.pdf?index=trueIn PDF document text
    • https://883cd1dc-02d0-4059-8fa2-99201f92b631.filesusr.com/ugd/6166c9_2d3d15f6c336407d9937f954642ac720.pdf?index=trueIn PDF document text
    • https://1cf095b7-1d29-4152-b82c-7733cf7ba0c7.filesusr.com/ugd/c1de29_b05e68f6329d4d3dab71de52bdf3f40f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/react_native_animated._view_transform_scale.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/85652867974.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_off0000fa49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA49 5428 bytes
SHA-256: ac1625a3cc231d74fe940dac5fb69f417897280e5b14bd663739268d21a95923
font_01_sfnt_off00010ca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA6 12152 bytes
SHA-256: 60f88cd73dea34d90bd99f9e63148e66ac821c739d52a483b915fb852cd6069e

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