Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9e1c9c3a678e1f9…

MALICIOUS

PDF

78.5 KB Created: 2021-03-24 00:58:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: a3326f836be5603e96563cb42f094da5 SHA-1: d5d0665987747ef840de8b0730314beb95167bb8 SHA-256: d9e1c9c3a678e1f9c0d5607607e8d8ae4540bca09d3d8a3dd9a807bdea81ee3a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by ClamAV and an ML classifier as malicious. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a deceptive link farm. The presence of external URIs and the overall structure point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://vilenefex.ru/wix?keyword=raft+wars+3+hacked PDF link annotation
    • http://shopee24.site/plant_structure_worksheet_high_school5mx6z.pdfIn PDF document text
    • http://fonudesuwobulud.mygamesonline.org/mimijigesonedomowu.pdfIn PDF document text
    • http://finansi-7.online/how_to_adjust_the_tension_on_the_brother_bm-2600_sewing_machine0ghcc.pdfIn PDF document text
    • http://zipubezexupoka.mywebcommunity.org/79658655311.pdfIn PDF document text
    • http://lagejarejitog.mypressonline.com/23378710008.pdfIn PDF document text
    • http://wosedumuf.mywebcommunity.org/40523539445.pdfIn PDF document text
    • http://zixudivibudizu.scienceontheweb.net/nebirij.pdfIn PDF document text
    • http://juwaniwabi.medianewsonline.com/what_is_the_average_salary_for_a_cyber_security_engineer.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://869e45c2-9c2d-410b-ad52-4d3411d41339.filesusr.com/ugd/73bd41_ee31230cc6cc47168a3ce16db74e0964.pdf?index=trueIn PDF document text
    • http://tobikinos.onlinewebshop.net/d_d_bestiary_5e.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/278a7fa1-9d5b-40be-8fe2-88875d46fae4/morusuxitajix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4746867e-7699-40e7-9e0c-41f19e2b6d9c/61718207491.pdfIn PDF document text
    • https://2f60c0de-bae8-48d8-8f3f-ce7907f87c52.filesusr.com/ugd/badafb_de8d2bff8e5f4fe4ba80d025f4dd219c.pdf?index=trueIn PDF document text
    • http://mawidinivetobi.myartsonline.com/kapulaxekubajuze.pdfIn PDF document text
    • http://kojuvurapamox.myartsonline.com/93191320760.pdfIn PDF document text
    • http://limufij.myartsonline.com/zarezefuziw.pdfIn PDF document text
    • https://746420f6-3007-491b-ba72-fd43be5094e5.filesusr.com/ugd/277b62_453b01bae2b74a299fa134b8faaf2e37.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc7ce2f8-8b44-4b5c-92c2-66e7d13442da/free_printable_division_facts_table.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8faac406-4b6b-4636-87f8-9010e883de6c/harman_xxv-tc_pellet_stove_price.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_off0000e9bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BB 4928 bytes
SHA-256: 3db5d2d6d217d30664bdab1a2b0f3b85ea4db777c945edbc0f77dfe9dd1a387f
font_01_sfnt_off0000fa9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9B 10488 bytes
SHA-256: 326f101a0de7edde3ea9700a78116008ca4105787ba34aed223dc6fc9d875729
font_02_sfnt_off00011eb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB1 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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