Malicious PDF — malware analysis report

Static analysis result for SHA-256 029ae76d7acd8b54…

MALICIOUS

PDF

73.7 KB Created: 2021-04-26 01:57:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a6c0a5d3693c9f5543b9ba2c93df68ad SHA-1: 353adb1cdc44caf92a6887580af529955940ab3b SHA-256: 029ae76d7acd8b54c24a39fc26dc2d755dcef5386ed3f729501a700dcac68d2c
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 0.9726

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 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
  • 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://golowaki.ru/strik?utm_term=westinghouse+55+inch+tv+remote+control PDF link annotation
    • https://ripukalogud.weebly.com/uploads/1/3/4/3/134391837/3634797.pdfIn PDF document text
    • https://poxagubojawi.weebly.com/uploads/1/3/1/4/131482812/8421135.pdfIn PDF document text
    • https://jamitugila.weebly.com/uploads/1/3/4/0/134012499/fa9ec.pdfIn PDF document text
    • https://nagobajega.weebly.com/uploads/1/3/1/3/131380413/nesen.pdfIn PDF document text
    • http://drnextact.xyz/excel_vba_find_row_of_value_in_rangeg889l.pdfIn PDF document text
    • http://agentsoft.space/tryst_with_destiny_speech_summarydu04s.pdfIn PDF document text
    • https://vuwisirikufav.weebly.com/uploads/1/3/4/7/134765545/861d14a276749ad.pdfIn PDF document text
    • https://kimewazokedusa.weebly.com/uploads/1/3/1/4/131454536/2842038.pdfIn PDF document text
    • https://lupawepenotude.weebly.com/uploads/1/3/1/6/131606523/66567.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/34ddc608-bf47-4a73-9d1b-c8e98d4987fa/are_metal_roofs_noisy_when_it_rains.pdfIn PDF document text
    • http://xixisetakaku.epizy.com/life_cycle_of_balantidium_coli.pdfIn PDF document text
    • http://kanemotix.rf.gd/class_12_biology_book_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4d71137-0f49-48db-88dc-f28509eaae90/how_to_draw_radha_krishna_pencil_sketch_step_by_step.pdfIn PDF document text
    • http://mukonedes.epizy.com/83019968570.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36071096-a81b-4d97-bdfb-a9956b20b85e/mejirodiwedugorisovok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05c4c823-985d-4957-8fbb-9283ec10af0d/why_smoke_detector_keep_beeping.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0501e48e-2870-44cb-8db9-45bf0a96fe9a/luxizuzoxodono.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/672a3dd4-3b2a-4070-9ba8-48a1918b051b/lorikufivajit.pdfIn PDF document text
    • http://regojefef.epizy.com/6777628648.pdfIn 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_off0000f154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF154 5200 bytes
SHA-256: a9b69580fd4cf9bc85a0fb523aede0dc49f618d68f5054ee9e341fb14937338b
font_01_sfnt_off000102f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F8 11688 bytes
SHA-256: f2830a6362d8e654f843b74bf631dc3c382c6bab3cc93fe745bd20caca1c26da

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