Malicious PDF — malware analysis report

Static analysis result for SHA-256 c697b8b3e6a2b65d…

MALICIOUS

PDF

76.6 KB Created: 2021-03-28 05:11:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b258197a589efefae6fc203c64a04c2b SHA-1: 163200033fb12b0c30297adef32cd82a2da2318c SHA-256: c697b8b3e6a2b65d72c85bda0d3e6b508560084b35c51190b01a2a0eb70c769e
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or distributing further malware. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The embedded URLs suggest a link farm or redirection scheme to obscure the ultimate destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/123?utm_term=aplikasi+hapus+latar+belakang
    • https://cdn.sqhk.co/sitopizol/dOhdkHl/42795920161.pdf
    • http://kurs1.xyz/77151838232f5uz.pdf
    • https://cdn.sqhk.co/mobirewin/j2iaqjh/protect_my_girl_quotes.pdf
    • https://cdn.sqhk.co/rifusofuwedi/rzUjbJI/gibalukejoranedepirigurin.pdf
    • http://vakekaninu.iblogger.org/lipakozakuzipofamojogimos.pdf
    • https://cdn.sqhk.co/wimiwupo/ifugHAr/57393420469.pdf
    • http://stopro.store/siwejomipiziwamavizojoijdni.pdf
    • http://websporizle3.com/604834406614qm52.pdf
    • http://winoorama.space/dojasudegejerotidudnr68.pdf
    • http://pipvip.ru/poetry_definition_of_ballad_stanza8jgmf.pdf
    • http://dream-stat.ru/joyetech_evic_vtc_mini_no_atomizer_foundoraat.pdf
    • https://cdn.sqhk.co/taxodisilif/5pAnhdB/minigames_plugin_1._15._2_download.pdf
    • http://wersita.fun/vuwipibovexivusugimala74g9d.pdf
    • http://liketsven.xyz/resumen_del_libro_mi_pequeo_vampiroae9hq.pdf
    • http://gozipoxeget.iblogger.org/28946629850.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/83cc9c8e-f14c-4cab-9bae-0039adb3b716/what_are_good_ideas_for_a_persuasive_essay.pdf
    • http://dogumimuzelu.epizy.com/89432542411.pdf
    • https://uploads.strikinglycdn.com/files/7fce42a0-5a8c-44fd-b29e-7041e46a42a4/what_apps_are_available_on_roku_streaming_stick.pdf
    • https://1cd0d4d5-11d4-440c-a307-81f73801f601.filesusr.com/ugd/f0e51d_99c63cece4f34297bc8a98d53c13b9cc.pdf?index=true
    • https://709e7e89-b264-4d73-b757-064736ed86f1.filesusr.com/ugd/f523c3_477713a9cdf74eb395ce086e1fc5adbf.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c7a89674-6214-47fa-a476-175873fed571/how_do_you_set_the_time_on_a_citizen_eco_drive_manual.pdf
    • https://uploads.strikinglycdn.com/files/d4552428-2cfb-45cb-aeac-7550bfc02992/max_lucado_church_service_today.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e685.bin
815d205b15781a5320b5ca291b2841afc7012448783d3973a433d94e2e81f636		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE685 5272 bytes
font_01_sfnt_off0000f86a.bin
5110f41514089600d67ddb5e886dfab5569a75237f466d8437dab2e526541d10		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF86A 15624 bytes

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