Malicious PDF — malware analysis report

Static analysis result for SHA-256 c20b3dddd3d13c0c…

MALICIOUS

PDF

70.0 KB Created: 2021-03-19 23:20:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 87d8d7ddbaf98820428d7ccb7e96c81c SHA-1: 598f4a8926c64ebbdb14acd030f7d2784a3ffaeb SHA-256: c20b3dddd3d13c0c32a41686900bcc608531151ed569d634930874348d05c72d
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains numerous external links, many pointing to disposable hosting and acting as a link farm, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the overall structure strongly suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://zajinet.ru/strik?utm_term=how+do+i+find+the+ip+address+of+my+canon+printer+mac PDF link annotation
    • http://zoguponuwuxoli.medianewsonline.com/69889126076.pdfIn PDF document text
    • https://jufoximivovanad.weebly.com/uploads/1/3/4/0/134013024/574139.pdfIn PDF document text
    • https://wufodiwefoveve.weebly.com/uploads/1/3/4/8/134891768/1330381.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390383/normal_601e3bced64a6.pdfIn PDF document text
    • https://jasugupaxawuz.weebly.com/uploads/1/3/0/7/130740610/pizorelukidub-borofupezikinu-zinupa-xodika.pdfIn PDF document text
    • http://xiwupulo.medianewsonline.com/ong_orality_and_literacy_summary.pdfIn PDF document text
    • http://ramifapufebi.scienceontheweb.net/metro_cassina_de_pecchi_orari.pdfIn PDF document text
    • http://mobufuwiwid.medianewsonline.com/mukij.pdfIn PDF document text
    • https://goxanakevixi.weebly.com/uploads/1/3/4/8/134857001/defesizifagegukok.pdfIn PDF document text
    • http://vevovifox.scienceontheweb.net/50_verbos_regulares_en_ingles_en_presente_pasado_y_participio.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417212/normal_5ff8c4ca3d667.pdfIn PDF document text
    • http://foramodosug.mygamesonline.org/lonekami.pdfIn PDF document text
    • http://nabavawuzafurur.mygamesonline.org/attack_on_titan_all_characters_season_4.pdfIn PDF document text
    • http://favodokoleti.mypressonline.com/68247708378.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403270/normal_5febc577da4d7.pdfIn PDF document text
    • http://tumuduwaju.mypressonline.com/how_do_i_manually_backup_my_kindle_fire.pdfIn PDF document text
    • https://losanuritajog.weebly.com/uploads/1/3/4/7/134730792/85d04a8891.pdfIn PDF document text
    • https://puxezemugip.weebly.com/uploads/1/3/4/3/134311794/3261fe338.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pidodexogejax.myartsonline.com/sword_art_online_piano_sheet_music.pdfIn PDF document text
    • http://faleferesevo.onlinewebshop.net/learn_german_a1_book.pdfIn PDF document text
    • http://mifedisiso.atwebpages.com/the_magic_of_belle_isle_similar_movies.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_off0000d4c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C5 5516 bytes
SHA-256: 5b001dff6bfda8b3dbc3b42630cc4faefc86c89ae967fd457ef15a149fa8d1c2
font_01_sfnt_off0000e775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE775 10128 bytes
SHA-256: c9dd776828a5a3c767535f4926e3e120aa2bf5eb1d48159b5075701ca5e13296

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