Malicious PDF — malware analysis report

Static analysis result for SHA-256 6def3cdb48d81f1d…

MALICIOUS

PDF

92.4 KB Created: 2021-03-20 17:04:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: db4765f9517741b8c54cc92a8f76183f SHA-1: c9347152a8e874e4bbae9dae5e52b13580655ded SHA-256: 6def3cdb48d81f1d6250470f8d5d2dea3dbfb00bbba7e70bfc301c4d6e958296
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 0.9919

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://xajibur.ru/wix?keyword=department+56+collectors+value+guide PDF link annotation
    • http://beautysss.site/62929747674shawe.pdfIn PDF document text
    • http://uabiomanix.xyz/how_much_does_a_water_treatment_engineer_makeoqqev.pdfIn PDF document text
    • http://akmurzina.com/sexefudozefijelipojimowe05jlk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476446/normal_5feb9bf1bf2b1.pdfIn PDF document text
    • http://pakabixi.22web.org/oxford_style_shoes_mens.pdfIn PDF document text
    • http://santaparker.store/vazekazowwf6y3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454822/normal_5fde793245beb.pdfIn PDF document text
    • http://portkamesto.site/justification_report_exampleg0zof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387428/normal_602fc04788376.pdfIn PDF document text
    • https://cdn.sqhk.co/gisatajofo/ih8chhV/paxifevolusowo.pdfIn PDF document text
    • http://zuwixegugul.22web.org/architectural_draftsman_job_description.pdfIn PDF document text
    • https://cdn.sqhk.co/zukuxenopo/hiijich/cute_animals_to_draw_easy_step_by_step.pdfIn PDF document text
    • https://cdn.sqhk.co/tudosiki/geinsjY/cookie_clicker_stock_market_ascension.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492294/normal_60230ffbb49b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420767/normal_5fd92d4d8b318.pdfIn PDF document text
    • http://gazzsheff.xyz/861033382481wq1e.pdfIn PDF document text
    • http://thedefenseforge.com/spanish_alphabet_lettershwlrr.pdfIn PDF document text
    • https://cdn.sqhk.co/tulovixegoke/uMF5nhh/fuvibenikokumunewalufefa.pdfIn PDF document text
    • https://cdn.sqhk.co/nilesatu/SViJogg/marketing_action_plan_template_excel.pdfIn PDF document text
    • http://regse.website/773048246965lhbd.pdfIn PDF document text
    • http://levelupguild.com/tisefegenorizowozafunu9cfcb.pdfIn PDF document text
    • http://tells.fun/reference_angles_in_radians_worksheet8hhpn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://motiwuk.rf.gd/zoduvezipelajuseziwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7951309-1eff-4432-b400-ad080957dcd0/how_do_i_change_my_vizio_tv_settings_without_a_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92c09bc1-f276-4109-a478-a16fcb13e889/the_road_to_el_dorado_full_movie_download_in_hindi_480p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eea11c25-ca20-4b17-a339-85e6a978f25e/wufuvezudirinurike.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c304749b-0a23-4984-86bc-335fd0d2114e/tom_sawyer_and_huckleberry_finn_movie_download.pdfIn PDF document text
    • http://xadogugatu.epizy.com/manejo_de_acidosis_metabolica_en_pediatria.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001029d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029D 5684 bytes
SHA-256: 7f0db5a1e4edfb10e7f657e7fc849bc954942a2488f9d7ddeba25f34f4659b05
font_01_sfnt_off00011678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11678 5732 bytes
SHA-256: 0a4ebc5b82d045c96cacc88048b87bd1605fea9c7e8ccfdc5982eaee5961cc14
font_02_sfnt_off000129e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129E2 6148 bytes
SHA-256: be38186c9256ba0e64b07d34cca2e63b176d3ffd182ae4667a642b503e748fe0
font_03_sfnt_off000139c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139C2 12580 bytes
SHA-256: ad8acce667411dd42c1c0d0e0fb1a040301e5a3c8d73f3c104bc5ad64254bfaf