Malicious PDF — malware analysis report

Static analysis result for SHA-256 0947d68cc38690fe…

MALICIOUS

PDF

82.7 KB Created: 2021-04-18 16:08:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9b060e5e09a0db51449e4f48f406f73e SHA-1: 41aad2c4cda542e8a2e491fb96ae235dd91c873f SHA-256: 0947d68cc38690fe99a413182ecce47f7e567866b31004ab6ac82d689771c222
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9990

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://gimoguvi.ru/strik?utm_term=months+of+the+year+worksheet+for+kindergarten PDF link annotation
    • https://zonotilikoper.weebly.com/uploads/1/3/1/0/131071062/6526832.pdfIn PDF document text
    • http://mobeditobaxul.scienceontheweb.net/8861647566.pdfIn PDF document text
    • http://guronid.mygamesonline.org/allotropes_of_oxygen.pdfIn PDF document text
    • https://papilezuserif.weebly.com/uploads/1/3/4/4/134437149/202537.pdfIn PDF document text
    • https://jufukakoxojopop.weebly.com/uploads/1/3/4/3/134317893/logubatojozub_roguguk_vizur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489237/normal_604d6653c9279.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380522/normal_601e0c73ed52f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477167/normal_5ff84472b0cc6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381737/normal_5fff5be37cd1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454679/normal_603a94e0f0446.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420230/normal_60518a1f28d96.pdfIn PDF document text
    • https://cdn.sqhk.co/wadupaxi/smhcljb/87314389877.pdfIn PDF document text
    • https://cdn.sqhk.co/venitalobeni/eZTiiZI/shadow_fight_2_titan_mod_apk_2020.pdfIn PDF document text
    • https://jukekusam.weebly.com/uploads/1/3/4/6/134651272/rigubonitir-xasajikulebodu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481424/normal_602909ede4487.pdfIn PDF document text
    • https://danodukuwen.weebly.com/uploads/1/3/1/6/131637043/7793822.pdfIn PDF document text
    • https://cdn.sqhk.co/nemuvefik/1ifidcz/66799568953.pdfIn PDF document text
    • https://cdn.sqhk.co/bupabumo/bijgsij/kuvidogopefazuz.pdfIn PDF document text
    • http://zebozewazogaso.scienceontheweb.net/how_to_calculate_dividends_paid_on_common_stock.pdfIn PDF document text
    • https://cdn.sqhk.co/gadowikuxe/kggoujb/zombie_shooter_dead_frontier.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://s3.amazonaws.com/kumasala/adobe_premiere_pro_cs5_mac_free_full_download.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/zufikisuvawuwuzujikifego.pdfIn PDF document text
    • http://dojafeduzig.myartsonline.com/types_of_exercises_for_seniors.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/25092580125.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_off0000f64b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64B 5188 bytes
SHA-256: e5275c4bbb5c69eb57684db70f64b45e4844b8d20b40974b04d0f0bcd75bf984
font_01_sfnt_off00010804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10804 11280 bytes
SHA-256: a2d71d050329d60b1a10f65de1c94a6e070f1157f45db88de71111c3a3d7f5c0
font_02_sfnt_off00012ead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EAD 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f