Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d7cfa379139b913…

MALICIOUS

PDF

76.4 KB Created: 2021-03-28 10:14:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: dc2b5b9646c0ba5bee38757e72346477 SHA-1: 3c603d4c207a09622d3bd0afe3ded901a36ad46f SHA-256: 9d7cfa379139b913e3b3570a672fb123c7bbf88909f4b57dac83e81481150066
126 Risk Score

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 0.9991

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://baarspo.ru/award?keyword=adjective+and+preposition+combinations+list+pdf PDF link annotation
    • https://cdn.sqhk.co/sedazozesufu/hahiejb/yeezy_350_carbon_outfit.pdfIn PDF document text
    • https://cdn.sqhk.co/fasotaluvose/ErijSij/super_power_girl_easy_lyrics.pdfIn PDF document text
    • http://vuvulusigi.scienceontheweb.net/zimunufimifezusapi.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/b1cjf79/monster_hunter_rise_trailer_2.pdfIn PDF document text
    • http://silewugebed.scienceontheweb.net/gajarake.pdfIn PDF document text
    • http://dotekebenutedex.scienceontheweb.net/convert_to_html_using_apache_poi.pdfIn PDF document text
    • http://dagaxen.22web.org/45298794614.pdfIn PDF document text
    • https://cdn.sqhk.co/pupevadojas/iihbjc2/5492745725.pdfIn PDF document text
    • http://tupaxeguna.scienceontheweb.net/99386995963.pdfIn PDF document text
    • http://munupozazuwo.iblogger.org/98259499990.pdfIn PDF document text
    • https://cdn.sqhk.co/vibejimipu/igZYPLu/kezotafunimosexikeba.pdfIn PDF document text
    • https://cdn.sqhk.co/duxajoje/WrCWggj/sosifolelafegozexonidipaj.pdfIn PDF document text
    • https://cdn.sqhk.co/sunomedude/LihIejb/random_group_maker_excel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://vuzuwukef.atwebpages.com/absceso_hepatico_amebiano_en_pediatria.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/54972641164.pdfIn PDF document text
    • http://kakavogulogij.onlinewebshop.net/70071644883.pdfIn PDF document text
    • http://nubuxaza.rf.gd/zar_biostatistical_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/deped_tambayan_curriculum_guide_filipino.pdfIn PDF document text
    • http://paluluw.epizy.com/non_behavioural_objectives.pdfIn PDF document text
    • http://nizamazibenu.rf.gd/kalifewipo.pdfIn PDF document text
    • http://nojikigor.myartsonline.com/2006_dodge_dakota_parts_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/law_of_success_napoleon_hill.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/love_letter_card_game_template.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2D 5356 bytes
SHA-256: fe7918d1630384cd106b42ffcef25ce8f64ba8074e7c89b39731861f6de42f71
font_01_sfnt_off0000f141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF141 10776 bytes
SHA-256: 10833a835043ae56bfba7d106defc3bbe7ab8fb2d44c4ec039d65fa3c6342ba1
font_02_sfnt_off00011583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11583 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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