Malicious PDF — malware analysis report

Static analysis result for SHA-256 c10d7cda625804d2…

MALICIOUS

PDF

74.9 KB Created: 2021-02-15 21:10:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 8cd131aa3ee61def8a4287503c1b88c2 SHA-1: 305779edffd32dce6ad319eb9ea5a124dfe15b93 SHA-256: c10d7cda625804d21e4c956433a46ca3d6d82c11d8d788e368bc0da813e3c111
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically a phishing or trojan distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://seumenha.ru/123?utm_term=tipos+de+investigacion+cientifica+ejemplos+pdf PDF link annotation
    • http://redit.fun/zemojozevoroju22g1.pdfIn PDF document text
    • https://livugazenexaru.weebly.com/uploads/1/3/1/6/131607095/5626965.pdfIn PDF document text
    • https://zuparimetusu.weebly.com/uploads/1/3/1/3/131378993/e322abb806e.pdfIn PDF document text
    • https://cdn.sqhk.co/jinuzekovodi/YheQ05r/server_2012_remote_desktop_services_manager_missing.pdfIn PDF document text
    • http://grizhoff.ru/benakazakewjnd0p.pdfIn PDF document text
    • https://cdn.sqhk.co/venifirub/hahijd5/98297037918.pdfIn PDF document text
    • http://okstore.info/hr_exit_strategy_templatezokzp.pdfIn PDF document text
    • https://dakikizubebara.weebly.com/uploads/1/3/4/8/134889455/ridiruwulupaw.pdfIn PDF document text
    • http://mynasert.online/simbolos_aztecas_y_su_significado14ndg.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopaji/hcioWhh/bendy_in_nightmare_run_song_1_hour.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lebejos/21960431771.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/selenukobatavebofelegapuk.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/barbie_girl_hd_video_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/is_guider_aither_good.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/discovery_education_science_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/free_android_keyboard_aosp.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/carson_dellosa_spanish_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/jezobasit/nubisaxetapid.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/87632966116.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/18403468234.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_off0000e25c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25C 5464 bytes
SHA-256: b5abea675c03d3f4f24413173e3c3ff7ba0f9a2f3378d82f19828411fad7f51c
font_01_sfnt_off0000f4fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FC 11892 bytes
SHA-256: cda7d388e6a538fe6a79d34e3bf9cdf5479242066709c461c771b591c0dfef51

Open this report in the interactive analyzer, or submit your own file for analysis.