Malicious PDF — malware analysis report

Static analysis result for SHA-256 f920da65400c88f3…

MALICIOUS

PDF

79.0 KB Created: 2021-05-13 10:51:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f03a1e2a55dab048a954ab93b196b0a8 SHA-1: 96a0f1c646838be617ea3927944d2aff93af6033 SHA-256: f920da65400c88f381673cea6bdf90a0a052d2419cb62eeda085ce8d6e1c0b18
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://zajinet.ru/strik?utm_term=best+basketball+offense+against+a+2-3+zone PDF link annotation
    • http://sivesesugipode.scienceontheweb.net/zonixidetawotedu.pdfIn PDF document text
    • http://bitcoinlearningcentre.online/cousins_malayalam_movie_songs_dance_performancepb3v4.pdfIn PDF document text
    • http://agent-ritual495.online/sql_server_2012_r2_full_crack1ffmz.pdfIn PDF document text
    • http://astrology-personal.online/nekokixebovebisunomtnlw.pdfIn PDF document text
    • http://soldatskaya6.ru/classroom_screen_exampleskirw0.pdfIn PDF document text
    • http://form-lnstagramcopyrightservice.com/how_to_run_a_book_club_meeting_on_zoomp5uf9.pdfIn PDF document text
    • http://arendaavto.taxi/66485269841w0lvz.pdfIn PDF document text
    • http://blognews.top/328236843071ubk.pdfIn PDF document text
    • http://eyebrowthreadingdallastx.com/adobe_illustrator_free_30_day_trialjxmbu.pdfIn PDF document text
    • http://giocodigital.website/87381643926cy9it.pdfIn PDF document text
    • http://kobivoweder.mypressonline.com/angielski_czasy_zestawienie.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b93d019-8e4d-4114-8a89-77b0df59e5dc/the_kingdom_of_dreams_and_madness_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7b8cd54-3da7-4452-8622-e866334b4005/hp_cp1215_cartridge_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25e3f2cd-e6ec-44fa-bc49-eaa3274a575e/15057774944.pdfIn PDF document text
    • http://wegamaluperetuj.atwebpages.com/55575153921.pdfIn PDF document text
    • http://supuwevul.atwebpages.com/polaris_360_pool_cleaner_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42a45138-5325-4668-b701-b026ce51ad91/ghosts_by_raina_telgemeier_main_characters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a9468c8-6465-4ca0-893e-1bb350838e68/9427618868.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e112ce80-629f-438f-a248-e0a69b6e16d7/gufobizatunujozub.pdfIn PDF document text
    • http://gipebevu.atwebpages.com/lugoxamib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de1599e2-b535-43b5-a0ea-3aec72126faf/how_much_is_an_inducer_motor_for_a_furnace.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_off0000f785.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF785 5468 bytes
SHA-256: 4aaf58194dcd35dcf57ad4cc3fe9020cad80e90741367d1fb30a8912e8339fca
font_01_sfnt_off00010a57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A57 10628 bytes
SHA-256: 7fc4142bd2c2e6924afcda630b80bf1bf37ec0df394ab6866e3668cdec7892a6

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