Malicious PDF — malware analysis report

Static analysis result for SHA-256 033466f70f270212…

MALICIOUS

PDF

80.8 KB Created: 2021-04-05 02:44:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9ece8efbe23988e98c5fb251dd1b3e94 SHA-1: b3b59a81728b00e5a401bc0cd85f495214118fd6 SHA-256: 033466f70f270212add6834c3185c74fb78bb255b2e062915e413f5b8d88d21c
186 Risk Score

Malware Insights

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

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 0.9988

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://botokaw.ru/strik?utm_term=data+mining+practical+machine+learning+tools+and+techniques+ppt PDF link annotation
    • https://mefovisesivem.weebly.com/uploads/1/3/4/5/134525463/52c37dd82b9e.pdfIn PDF document text
    • https://ruposasaje.weebly.com/uploads/1/3/4/3/134372592/22d0c.pdfIn PDF document text
    • http://vozajomaralamer.mygamesonline.org/72136053760.pdfIn PDF document text
    • https://pamigewome.weebly.com/uploads/1/3/4/6/134631685/148c06be756.pdfIn PDF document text
    • https://wejolizamu.weebly.com/uploads/1/3/4/7/134766198/fupitojekaxoguv.pdfIn PDF document text
    • https://xojakonokixamu.weebly.com/uploads/1/3/1/1/131164577/5a576f28f.pdfIn PDF document text
    • https://kumuxulunewun.weebly.com/uploads/1/3/0/7/130775174/tefojikowew_fajiruvo_sajole.pdfIn PDF document text
    • http://oneitstore.pro/is_500_horsepower_fastygvfl.pdfIn PDF document text
    • http://freshka.fun/vtech_cordless_phone_cs6919_manualoau5y.pdfIn PDF document text
    • https://fukusegoboviv.weebly.com/uploads/1/3/1/8/131856281/941620.pdfIn PDF document text
    • https://ganakinupep.weebly.com/uploads/1/3/4/5/134599301/2976347.pdfIn PDF document text
    • http://nageramuvepom.mywebcommunity.org/12569879923.pdfIn PDF document text
    • https://kodabovoxalomas.weebly.com/uploads/1/3/5/3/135340354/7243074.pdfIn PDF document text
    • http://myluckywin.site/29402153329qt67e.pdfIn PDF document text
    • http://linza.media/97467864498k32pr.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://eaa62ee9-779c-4a2d-9f50-6c66b019a99c.filesusr.com/ugd/1cc777_7e2284cafbac45439fd4490c929b1834.pdf?index=trueIn PDF document text
    • https://1e16f6d7-285b-4488-bf07-d3e24ac90e20.filesusr.com/ugd/417718_717e98ea51c941a79f6b73ac96441db2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/91b66be2-8827-4fc7-b532-013218a3317c/5_small_stories_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e263a81d-e345-440b-b2c1-8682baf6a8b7/30589641773.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01a59ef8-e245-4e72-879a-89140f5267f8/lasko_tower_fan_ionizer_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6362e1b-8562-4771-b603-b6003b7e97da/are_ball_pythons_good_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e365f78-f748-40f2-acfa-44d4723e930b/lelapafabomunosu.pdfIn PDF document text
    • https://30cc9e9c-6145-4029-bfdc-d0561bdb3a10.filesusr.com/ugd/0dcf4b_7c8c34d75b9247eba8be373e95421641.pdf?index=trueIn PDF document text
    • https://d5fb4b5d-766d-4e54-ab1c-ecc61d2b7d82.filesusr.com/ugd/b0c8dc_b91d70c3b5a74ce5844681caac4b9696.pdf?index=trueIn PDF document text
    • https://c72a6d71-2fad-4f5a-8b7a-a7c165485bce.filesusr.com/ugd/a4966f_318afb63c20142dd8bc89154392ec6d6.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF67 2272 bytes
SHA-256: 0650ca83d5f4762af52636487b52587ce3c69e8a887f05a88562384cf0d28246
font_01_sfnt_off0000f9b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B4 5612 bytes
SHA-256: a1c64fcf8ebc4864a750179ee8666527107b55ec65d621607aafe72226a0fd2e
font_02_sfnt_off00010c9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C9B 11708 bytes
SHA-256: 3713c980e2c72db2aa0dc6e95affb132f4bc44494a94ec6dea25c90baad9aeb0