Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaa9765ecf0b8233…

MALICIOUS

PDF

69.9 KB Created: 2021-03-29 07:06:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 255fb693c26e2cc17ea9de76a63c1a5f SHA-1: 595003b1b018c1782dd689bf1d1c8559b9eb94f0 SHA-256: eaa9765ecf0b823399d9bbaa83322df8accfeaddfa4a812b99dddb4ac0589560
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 0.9996

Heuristics 5

  • 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 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://nipisod.ru/123?utm_term=voterguide.+sos.+ca.+gov+prop+34 PDF link annotation
    • https://cdn.sqhk.co/dofexoxev/y1igmhe/1658756218.pdfIn PDF document text
    • http://hookup753.fun/power_of_attitude_quotesa8wjr.pdfIn PDF document text
    • https://cdn.sqhk.co/tamenotu/gggngeY/stop_robots_from_submitting_forms.pdfIn PDF document text
    • http://tuzogat.sportsontheweb.net/52325029100.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/Goge6ib/lean_bulk_workout_plan.pdfIn PDF document text
    • https://cdn.sqhk.co/gatezoru/hjhjcjg/umc_burn_consulting.pdfIn PDF document text
    • http://osmosiotzs.fun/short_stories_to_readpp12p.pdfIn PDF document text
    • http://batmbatm.ru/94846618217zungv.pdfIn PDF document text
    • http://onlinetyz.xyz/estimation_costing_and_valuation_notes4r7gk.pdfIn PDF document text
    • https://cdn.sqhk.co/vujenibolo/cz8T3hi/descargar_taxi_sim_2020_pc.pdfIn PDF document text
    • http://momsmall.space/kamigojarilezemvkzpl.pdfIn PDF document text
    • http://kafalukuwemi.mygamesonline.org/30302173987.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jeleruvimubag.rf.gd/english_stories_with_tamil_meaning_in.pdfIn PDF document text
    • http://votixeju.onlinewebshop.net/autocad_3d_commands_list.pdfIn PDF document text
    • http://lukarimavelo.epizy.com/23747979735.pdfIn PDF document text
    • http://dixorinatedav.rf.gd/nature_of_national_interest.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/625d82a2-0b7a-4ee4-bfef-a6ea6b16c49c/45257199740.pdfIn PDF document text
    • http://jevitof.epizy.com/bijetutozo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f73c079-3d2e-4c27-a66f-c3040140d01c/rizemufumevoguz.pdfIn PDF document text
    • http://zeraginijumeje.epizy.com/50680009109.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70e5936a-8d97-4d54-a8e7-a3d2e554a874/bofibe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/becdedfe-5d00-413b-9071-c1850383bbad/janat.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_off0000d382.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD382 5516 bytes
SHA-256: 5dbcae1052f577b1cb572f5b0052360f65379d92fb2aafd4539a01685351d3a2
font_01_sfnt_off0000e670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE670 10528 bytes
SHA-256: d3dd531ed2233df05cd7d6a5b88ffe9948825f147c78907f6c4dcff71499a941

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