Malicious PDF — malware analysis report

Static analysis result for SHA-256 635d30dda7b91c14…

MALICIOUS

PDF

78.1 KB Created: 2021-03-15 03:05:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d198feb78ed10e0ab2db9e3b1e612431 SHA-1: b080f415514a1cca086dd5a3ef718b8dc0613e94 SHA-256: 635d30dda7b91c1466b7b34eae820b98f1e3f27e7a539b28954277f4def7e153
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 0.9993

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://maypoin.ru/123?utm_term=api+performance+testing+using+jmeter+guru99 PDF link annotation
    • http://4gusevshop.space/4112352699ht1ym.pdfIn PDF document text
    • http://pakunobun.getenjoyment.net/ktm_1290_owners_club.pdfIn PDF document text
    • https://cdn.sqhk.co/bivosozos/h0zjfeP/bobakulanosido.pdfIn PDF document text
    • https://cdn.sqhk.co/gotakavapu/3Gigdhi/46419385024.pdfIn PDF document text
    • http://kozidozilujivox.getenjoyment.net/beyond_brawn_workout_program.pdfIn PDF document text
    • https://cdn.sqhk.co/mikevoponage/hbhgQlN/car_racing_games_for_pc_free_download_2020.pdfIn PDF document text
    • http://nomokesus.sportsontheweb.net/vegutiwikaweriso.pdfIn PDF document text
    • http://nomokesus.sportsontheweb.net/58543958557.pdfIn PDF document text
    • https://cdn.sqhk.co/perokokamosa/ijjfjdw/mastermind_movie_2016_true_story.pdfIn PDF document text
    • http://pokezokebawi.mygamesonline.org/pebilujeropitol.pdfIn PDF document text
    • http://verenica.net/feliximivomadufenitozarerdezt.pdfIn PDF document text
    • http://reassurez-moi-fr.info/kogemefipewilefzkxkj.pdfIn PDF document text
    • https://cdn.sqhk.co/vutexexukus/gfuZp5L/74002916287.pdfIn PDF document text
    • http://viniveba.mywebcommunity.org/44003602038.pdfIn PDF document text
    • http://lnstagramservicecopyrights.com/his_mercy_is_more_sheet_music3r97p.pdfIn PDF document text
    • https://cdn.sqhk.co/giruzegovu/ha2lVTK/nifus.pdfIn PDF document text
    • http://alluniversity.fun/tell_me_a_riddle_tillie_olsenmfog9.pdfIn PDF document text
    • https://cdn.sqhk.co/funixatugesi/1f1rKft/jivudog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://donijexufenu.onlinewebshop.net/franz_bardon_the_practice_of_magical_evocation.pdfIn PDF document text
    • http://tizeruxabono.onlinewebshop.net/guzemiveb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/523f788b-11ee-42b1-92d4-9f0b0c6741a9/federal_holidays_2021_united_states.pdfIn PDF document text
    • http://wukevivetarapu.myartsonline.com/how_to_make_your_own_ice_cream_at_home_easy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/057b512f-3fdf-4e3a-a0ed-7b5cee9ac652/98839663945.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_off0000ef22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF22 5524 bytes
SHA-256: 0eea417ef2b254965964cca6a06c2151204fff3b83969e77033ab3bb523c1de2
font_01_sfnt_off000101db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101DB 11388 bytes
SHA-256: 7dd3a724d541e656e7e4b4e964260da1912ee8d7d47fe9484ba57aca18f5f6e8

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