Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fd3c49086430d3b…

MALICIOUS

PDF

74.7 KB Created: 2021-03-23 12:18:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 132a69460973a9d4f0cea21fa4197182 SHA-1: a432bf83d59ddbe623d7bbc4c52eafa782f9d1ba SHA-256: 9fd3c49086430d3ba69c03adfe5ee44dda00fd9a1c1be031decf2f94911df4cc
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting it's part of a link farm designed to drive traffic or host phishing content. The embedded URLs and the heuristic firings strongly suggest a phishing or SEO spam attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://lozipotod.ru/123?utm_term=el+zend+avesta+pdf PDF link annotation
    • https://cdn.sqhk.co/jaziwuke/MiczOJK/outlook_for_copper_prices_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451545/normal_60541420458bc.pdfIn PDF document text
    • https://cdn.sqhk.co/tisewesir/d4hgjhc/warlords_of_draenor_raids_solo.pdfIn PDF document text
    • http://tuwatolu.22web.org/figosazenovovogip.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411922/normal_5fee01bab04ee.pdfIn PDF document text
    • http://tizuzagejuropol.22web.org/98893384103.pdfIn PDF document text
    • https://cdn.sqhk.co/kimejijomaki/DZhbhjo/centurylink_t1_support_phone_number.pdfIn PDF document text
    • https://wadewasugidaf.weebly.com/uploads/1/3/0/7/130775384/44a94.pdfIn PDF document text
    • https://xujufefar.weebly.com/uploads/1/3/1/4/131483110/36c8ebf2ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457320/normal_60436f8d9abb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486745/normal_6021949d090f4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://fe426b01-1dd0-498a-b08e-7ec37e320b94.filesusr.com/ugd/6b45f0_bfcdd34163954770bb5f57d8f8ca9531.pdf?index=trueIn PDF document text
    • http://duposavolat.rf.gd/20811665142.pdfIn PDF document text
    • https://d86ad34a-7df2-4f47-937b-a12ab5abc0fa.filesusr.com/ugd/8cbfce_d3b74d33d173485f94dac72a302bbb6f.pdf?index=trueIn PDF document text
    • https://6e229dea-1f83-4be8-8cd3-388eabd4f5e3.filesusr.com/ugd/1cfe37_09f688820c624fdbbaab085709c944a2.pdf?index=trueIn PDF document text
    • https://0502d5d0-a0f5-47b8-bc1c-644c46e4e431.filesusr.com/ugd/6cabbb_b85ae8ef32554ba8b6939fbc6e655978.pdf?index=trueIn PDF document text
    • https://adc0bc6f-2b4d-4951-bce0-9128d215fa34.filesusr.com/ugd/5ea4d5_04167514868e46b5b2fc2720bb408a13.pdf?index=trueIn PDF document text
    • https://bad3f395-1638-4667-b349-d6f934eeab49.filesusr.com/ugd/ed2d23_0b637d250b974f7cb3ce586faca80230.pdf?index=trueIn PDF document text
    • http://suzitemilivofer.epizy.com/atlante_anatomia_microscopica_wheater.pdfIn PDF document text
    • https://d8d078ea-10ec-4787-8e21-ef6e32b87a24.filesusr.com/ugd/8f6098_40c43900267c4fdd95efa04b1773f589.pdf?index=trueIn PDF document text
    • http://vivazuriperulus.epizy.com/vogixeper.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A5 4636 bytes
SHA-256: 9472efca304ec59e1e379d0ed4b8e394e5a769ce7629867bdd76cd3a1d457c61
font_01_sfnt_off0000e886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE886 11572 bytes
SHA-256: 965208cb18f2e15dfaae9218da5fee809903f9f84ee9d81d5af0d97c0d553716
font_02_sfnt_off00010e4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E4A 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f