Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b58069dea3d5a34…

MALICIOUS

PDF

81.7 KB Created: 2021-03-19 01:27:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: df177ca859c337087315c71dd496aa78 SHA-1: 11afc12ed48e4c82fb0d50d68a7dc64b3b3ca3ab SHA-256: 6b58069dea3d5a34015b2dbeac5035d90ffd78ca58a22f924042eb8568888c04
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://jumiwimov.ru/wix?keyword=epiphone+sg+400+custom+shop+limited+edition PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446388/normal_6024859983a95.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460983/normal_5fc8de8072dcd.pdfIn PDF document text
    • http://tonagruz.ru/american_heart_association_bls_manuaoc10x.pdfIn PDF document text
    • https://cdn.sqhk.co/gutifusuf/1zijchi/stickman_io_survival_fighting_game_supreme_sticks.pdfIn PDF document text
    • https://cdn.sqhk.co/lanabeja/5ygeABQ/wesewejulor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388827/normal_6041df75968fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366311/normal_60058fd34dbd3.pdfIn PDF document text
    • http://boldly-grow.com/rezuzowozuseju4am9r.pdfIn PDF document text
    • http://fartook.online/cuales_son_los_medios_de_comunicacion_escrita_y_oralkryur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501193/normal_60534cade7587.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454541/normal_602142e407ddd.pdfIn PDF document text
    • http://helpverifybadges.com/oxford_discover_5_worksheetsmyq14.pdfIn PDF document text
    • http://getsalon.xyz/89403832509fs4k7.pdfIn PDF document text
    • http://topvideo.design/how_to_set_time_casio_g_shock_547866muo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448542/normal_5fc858b34a0b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454691/normal_602423d41e339.pdfIn PDF document text
    • https://cdn.sqhk.co/tajugajobib/gfjeNXu/farm_village_2_game_free_download_for_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463785/normal_6047b9f37d1ce.pdfIn PDF document text
    • http://presentinsta.site/biblia_de_estudio_holman_en6fug9.pdfIn PDF document text
    • http://idealicacolumbia.site/unit_operations_of_chemical_engineering_7th_edition_solutions_manual_free_downloaduno5r.pdfIn PDF document text
    • http://ruvujagefeko.mygamesonline.org/21108527711.pdfIn PDF document text
    • https://cdn.sqhk.co/xapawavuma/j2hbha0/citizenship_test_without_answers.pdfIn PDF document text
    • http://afracheat1.xyz/what_is_the_algorithm_to_solve_a_2x2_rubiks_cube7n9w4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://supajiwa.myartsonline.com/can_mini_splits_heat_and_cool_at_same_time.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_off00010229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10229 5368 bytes
SHA-256: e576a4a2b847be2fb0eb0f8aa24caec1eeb848c7533c30cee974b60294209879
font_01_sfnt_off0001145b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1145B 10864 bytes
SHA-256: 5a9de689177be5aa08b9669a29e6f64dd177b42d55350079fc8120589bc19a93

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