Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d81c5ad07b42164…

MALICIOUS

PDF

78.5 KB Created: 2021-04-26 06:13:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 1a279e4aaa82bb15be139a22160e6772 SHA-1: 2705d786742d86bb4939fbf8894c179c010d613c SHA-256: 5d81c5ad07b42164d991013272fc604c3387b06ea9b36ff2a7c256cee9612e14
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains numerous embedded URLs, many pointing to disposable hosting, and one URL is specifically associated with a 'burger king promotion' lure. The presence of these links suggests the document is designed to redirect users to phishing or malware distribution sites.

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://botokaw.ru/strik?utm_term=burger+king+promotion+today+sri+lanka PDF link annotation
    • https://cdn.sqhk.co/vixuwegijelo/jpmjbia/minecraft_new_ore.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461777/normal_600e963ead26f.pdfIn PDF document text
    • http://gaydating.world/lerotasudavazapemvu66i.pdfIn PDF document text
    • http://alcozerox.com/gonadil_f_use_forwgu6e.pdfIn PDF document text
    • http://gloslides.com/95975539654f98aq.pdfIn PDF document text
    • http://ig-copyrightnoticehelp.com/lakincg4w1.pdfIn PDF document text
    • http://plsale.pro/bugelilopetarusekuvunufuspyewm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418166/normal_604da866895c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464529/normal_5ff26c1864073.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470681/normal_601da19480e31.pdfIn PDF document text
    • https://cdn.sqhk.co/dukasavubu/hcqjljj/ball_shooting_games_online_free.pdfIn PDF document text
    • http://agent-spv.space/kitchenaid_superba_dishwasher_installation_manual38pim.pdfIn PDF document text
    • https://cdn.sqhk.co/pepupiribojo/jhS0jbk/87703105731.pdfIn PDF document text
    • https://cdn.sqhk.co/xowoluve/bvjeejj/russian_car_driving_simulator_hd_download.pdfIn PDF document text
    • https://cdn.sqhk.co/ronuwimo/giRiiZP/jiwapedufumekoranoluxas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://507d1b22-ea03-4061-a262-f79425337ca2.filesusr.com/ugd/a374b9_6f3fed1fbfc24e9f8012411f3154cf15.pdf?index=trueIn PDF document text
    • https://c809e8a6-5bdf-489d-8d8c-df4e4638a115.filesusr.com/ugd/45a296_3e40f4d72f144df2bb83fa1e4da031ac.pdf?index=trueIn PDF document text
    • https://3f9320ff-391d-49df-b192-c557e211a93c.filesusr.com/ugd/469aea_1586890754de4b83ba3de5a875feffa6.pdf?index=trueIn PDF document text
    • https://27a83426-c768-4525-a63d-b5b732cca755.filesusr.com/ugd/28b3f7_db835219926545dd8eb3b2bb99c0bd5a.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF140 5496 bytes
SHA-256: 08cdb403582671e2f7363fb66901af32b7caa537bcb75ae38b2d35da3bbabd2e
font_01_sfnt_off000103e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E9 12144 bytes
SHA-256: 739af207beebe3c194db2faff32a9e467f6154cf6358e98b0177b9e4b393281d

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