Malicious PDF — malware analysis report

Static analysis result for SHA-256 94eb4f4a7877fa0c…

MALICIOUS

PDF

79.7 KB Created: 2021-04-15 07:50:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 211828c1a03833aef3bdbdcd9ae92904 SHA-1: 820f74e828563ec02ebf1b9ecb01d1f4fd5b5c57 SHA-256: 94eb4f4a7877fa0c5b11ca0fab3c8e8cbc61fad64afcae483fe4239da1b4ed6f
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO poisoning tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The embedded URLs, such as 'https://baarspo.ru/strik?utm_term=how+to+change+spark+plug+on+champion+generator', are designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/strik?utm_term=how+to+change+spark+plug+on+champion+generator PDF link annotation
    • https://pabixiwirixe.weebly.com/uploads/1/3/1/0/131071256/4135507.pdfIn PDF document text
    • https://cdn.sqhk.co/napefabet/hdjuHia/pokemon_black_emulator_for_android.pdfIn PDF document text
    • http://jabudapitu.scienceontheweb.net/anthony_robbins_unlimited_power_book.pdfIn PDF document text
    • https://cdn.sqhk.co/kupodakojav/ctcgfcC/data_analysis_process_in_qualitative_research.pdfIn PDF document text
    • https://divevuke.weebly.com/uploads/1/3/3/9/133999966/3346415.pdfIn PDF document text
    • https://cdn.sqhk.co/nawamuzimosu/Mjd7JD2/banisixozanufuvek.pdfIn PDF document text
    • http://zipubezexupoka.mywebcommunity.org/how_to_change_battery_on_jbl_flip_3.pdfIn PDF document text
    • https://cdn.sqhk.co/dubutemaruxu/ggAhhbe/77318593507.pdfIn PDF document text
    • https://cdn.sqhk.co/pazaxefuma/Fajamym/36470690244.pdfIn PDF document text
    • https://cdn.sqhk.co/mugejufunij/hhiihii/cancel_livephish_plus.pdfIn PDF document text
    • https://cdn.sqhk.co/kakezesarop/jfzdjaJ/logo_quiz_level_15_all_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxuvedije/3GKhgje/90228075477.pdfIn PDF document text
    • https://vadurevagide.weebly.com/uploads/1/3/3/9/133999829/252495.pdfIn PDF document text
    • https://cdn.sqhk.co/senuziker/qNZPgck/leap_card_top_up_limerick.pdfIn PDF document text
    • http://vawadofofasip.getenjoyment.net/sudisipepabuzibapawoxakem.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/gfnierx/54768440006.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a7da3e60-63c8-46c1-a846-eab7df628ed2.filesusr.com/ugd/bba345_1b5d8703e40f4c30b51f4b192359fc9c.pdf?index=trueIn PDF document text
    • http://bodegifu.atwebpages.com/kenmore_microwave_790.803_size.pdfIn PDF document text
    • https://d872ce2a-2baf-4032-ab86-ab75b2f66d52.filesusr.com/ugd/338562_c83af12905d74aa1b419660d5b3fcd64.pdf?index=trueIn PDF document text
    • https://8a05da06-75fd-4b4b-8779-f7668a2fa4a0.filesusr.com/ugd/da32d9_5bc6faff47864753b64555b4a5cbc651.pdf?index=trueIn PDF document text
    • https://724418e0-3ace-43c1-abd8-628b4820fc71.filesusr.com/ugd/6df952_58a1f42ae39d436097588bd5637f59b9.pdf?index=trueIn 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_off0000fa3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3F 5464 bytes
SHA-256: 01d20971c9aac77a8e5070dde4b9c5a7187ccfbd11abda0a4ccb6853bbcd53c5
font_01_sfnt_off00010cc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC3 10528 bytes
SHA-256: d692d6f625a46be90846f62531aa1deb2b27958c2af0ede66456e160bac0c826