Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb2dbbe8eb009ca6…

MALICIOUS

PDF

87.6 KB Created: 2021-03-13 20:11:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: a5e3447f6d059dcbaac461904e9474a0 SHA-1: 587b4b1f699c61f5f9082fb85e6238f38a396a18 SHA-256: bb2dbbe8eb009ca6bd4c9a8c4848439b1b86136529b73311d9e822d18d53b0ed
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and metadata suggesting it is part of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The primary IOC is the external URI pointing to a suspicious domain, which is likely the intended destination for the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://kuzutuzo.ru/wix?keyword=sims+3+bait+for+jellyfish PDF link annotation
    • http://xegazufagabapo.22web.org/goxodebikodaw.pdfIn PDF document text
    • http://mobeditobaxul.scienceontheweb.net/libro_de_metodologia_dela_investigacion_cientifica_sampieri.pdfIn PDF document text
    • http://vanimerukaguto.scienceontheweb.net/depimeje.pdfIn PDF document text
    • http://bumasujofoj.getenjoyment.net/61831569904.pdfIn PDF document text
    • http://sutixekume.22web.org/chemistry_notes_for_ssc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467322/normal_5fde1af99fa92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476282/normal_6018808f90bc0.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://uploads.strikinglycdn.com/files/3e365f78-f748-40f2-acfa-44d4723e930b/lelapafabomunosu.pdfIn PDF document text
    • http://rajixubododafu.epizy.com/bernina_1010_sewing_machine_instruction_manual.pdfIn PDF document text
    • http://mudafumiziw.rf.gd/jijekomejuxaxoxurawi.pdfIn PDF document text
    • http://lojaxafolato.epizy.com/gisesuviwizunetojedexedup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/518fab93-d577-4886-8427-52f3d8e7f698/early_american_literature_reading_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1b87c0f-c0c8-4ac3-b970-ff89f8bfb924/wipomojijolib.pdfIn PDF document text
    • http://tososite.onlinewebshop.net/best_crossfit_wod_ever.pdfIn PDF document text
    • http://wovuluvoju.onlinewebshop.net/rumonuja.pdfIn PDF document text
    • http://vudajerex.rf.gd/10701089742.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5a9243b-d19e-4dbe-bbf1-3cfa7e372069/how_to_export_premiere_pro_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7caf0b9-3809-43c4-a400-84c938ec2cba/fevamapodorafononi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/538bfcd1-3f48-4d3e-a857-b019dee9125d/ano_ibig_sabihin_ng_travel_brochure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1c34f23-35b0-400e-a037-11b067feb432/18464974426.pdfIn PDF document text
    • http://sozidaxaguzir.rf.gd/metlife_uae_forms.pdfIn PDF document text
    • http://jisidanosesozu.epizy.com/28704219629.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_off00010bf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF5 5276 bytes
SHA-256: 209f2519b0c3605021cde740c4ac4717a8c730825c5c41f8d2d4ba31777ddfa7
font_01_sfnt_off00011ddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DDF 10740 bytes
SHA-256: 36ed5d7dd4a9329fa4ecd610c9a31249516c2e5b13cff33d1c58f7423745ea2a
font_02_sfnt_off000142cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142CC 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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