Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e5c405071e870f1…

MALICIOUS

PDF

71.2 KB Created: 2021-01-30 17:27:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 24c9de390370c2f7b78a2c4503e3b3bc SHA-1: 7563a868e41f99e05af15bfb00173180a0f229e5 SHA-256: 5e5c405071e870f1e744cad6e03eb4ce1d0dbfcbb6f3123729fb387fe3bea979
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, suggesting a phishing or SEO manipulation tactic. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://baarspo.ru/123?utm_term=january+2016+english+regents+answers PDF link annotation
    • https://cdn.sqhk.co/borefigux/jbsFgHF/alienware_monitor_aw2518hf_driver.pdfIn PDF document text
    • https://cdn.sqhk.co/gorokipo/iirYFia/karevi.pdfIn PDF document text
    • https://cdn.sqhk.co/fuluniziwav/hjjfhdA/nevarukilafege.pdfIn PDF document text
    • https://begosibaluta.weebly.com/uploads/1/3/0/7/130775163/c9818e65a03.pdfIn PDF document text
    • http://peskomment.ru/27172125739jrmc0.pdfIn PDF document text
    • https://cdn.sqhk.co/guzowozuk/ifVgcgh/truck_simulator_offroad_2_mod_apk.pdfIn PDF document text
    • https://zodemabu.weebly.com/uploads/1/3/4/8/134896511/442412.pdfIn PDF document text
    • http://aov.one/ateC59Ften_gC3B6mlek_soru_ve_cevaplarC4B1wg5e5.pdfIn PDF document text
    • http://free-at.pro/all_cheats_for_gta_5_pcsm4to.pdfIn PDF document text
    • https://kisuwirabavaruz.weebly.com/uploads/1/3/3/9/133999170/ecd0f0e4db7b5f8.pdfIn PDF document text
    • https://xibigulekin.weebly.com/uploads/1/3/0/9/130968960/2101996.pdfIn PDF document text
    • https://nupigefaxobabu.weebly.com/uploads/1/3/1/0/131070289/vubixinovolujun-sudofexizofisew-mavivosexeri-tirave.pdfIn PDF document text
    • http://anyita.space/69903646329exm5.pdfIn PDF document text
    • http://fsbsiod.com/nisatelizifopuidg9q.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xogegusubo.rf.gd/editable_invitation_template_ks1.pdfIn PDF document text
    • http://rigitusavogu.epizy.com/baseball_score_sheet_template.pdfIn PDF document text
    • http://papipafikumi.epizy.com/cisco_anyconnect_for_ubuntu.pdfIn PDF document text
    • http://jesebikalag.epizy.com/aravinda_sametha_anaganaga_song.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_off0000d820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD820 5612 bytes
SHA-256: 4a5e6fc890043ee3e7ad8d94bc83069773a6e3970c8f009715c2d744492898a7
font_01_sfnt_off0000eb50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB50 10728 bytes
SHA-256: 21e7f1b82b6202b31df0709b831a3405e80592da602d228df6aff57767637b05

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