Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8b9786b8f585803…

MALICIOUS

PDF

100.4 KB Created: 2021-04-06 19:12:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 55639eef3fad8d1f509542bd84b00a3c SHA-1: df6bc2a70f2819866877b0e19060b759c00aa35d SHA-256: e8b9786b8f58580390eb7e60ad2d7c06b88cbc799a2842a7115e2e36cc3fb8c1
134 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bologen.ru/123?utm_term=adanga+maru+full+movie++isaimini+hd PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4473651/normal_6058a93f1a9e4.pdfIn PDF document text
    • http://ndfnasg.xyz/vintage_band_t_shirts_for_saleh379e.pdfIn PDF document text
    • https://vafomelopujoxo.weebly.com/uploads/1/3/4/8/134864043/jofixolekutapogu.pdfIn PDF document text
    • http://mini-cam-v2.club/what_are_the_advantages_of_being_rich0efgr.pdfIn PDF document text
    • http://kino-vezde.ru/swing_trading_options_coursetfva0.pdfIn PDF document text
    • https://xomaribimufad.weebly.com/uploads/1/3/1/1/131163516/suvuwolarewexujop.pdfIn PDF document text
    • http://tarezirok.mypressonline.com/71758082520.pdfIn PDF document text
    • http://gakawisogafuga.mygamesonline.org/catalogo_de_cuentas_de_empresa_comercial.pdfIn PDF document text
    • http://matroskin.space/pokemon_pikachu_wallpaper_phone0jpv3.pdfIn PDF document text
    • http://liberum.sportsontheweb.net/health_and_safety_plan_for_construction_sites.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457862/normal_5fd37400c8a95.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://gagugitebuf.atwebpages.com/apprendre_le_russe_assimil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/938d1c7d-8810-49d1-9ab5-8499e4cea1f7/tumuxakiromozusalobumozir.pdfIn PDF document text
    • http://fusozevukatamir.atwebpages.com/29312986662.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca728eff-3eba-4f0f-9e5e-feff2f73f7b7/are_braun_coffee_makers_good.pdfIn PDF document text
    • http://zulixamurot.rf.gd/77290421380.pdfIn PDF document text
    • http://faguvepeme.rf.gd/schindler_s_list_sheet_music_piano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71376ffc-3641-4b08-8d69-a78b06775cb7/sharp_objects_trailer_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52d692d7-1fdf-4467-8886-fd070c8ae2f9/22133038146.pdfIn PDF document text
    • http://topowurarasixe.epizy.com/95681417598.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6edc6e40-7a4d-40c2-b266-5fd20d180a1d/philips_wake-up_light_hf3500_01_manual.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13187 5172 bytes
SHA-256: 95a075f7ee39c017bca375b1d47cd9f4f3e12efa50f23b1a9d1d3207a4fae4c0
font_01_sfnt_off000142ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142EC 2528 bytes
SHA-256: 2fc4f6e79f33e5cf5be338740dba576f75595c86e465e46f31e2cb78fae5cd88
font_02_sfnt_off00014d86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D86 11864 bytes
SHA-256: 1cbcd11a13647c4b89bda16f0f5403936dff069cc4e812b58c374ef8e8cfb0fe
font_03_sfnt_off000175c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x175C5 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3