Malicious PDF — malware analysis report

Static analysis result for SHA-256 49bb967ec04574e5…

MALICIOUS

PDF

90.4 KB Created: 2021-04-09 02:07:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: c8bfad8fc0b43ba97460650aec0c156b SHA-1: e5663005e321c8f376b0e64e577eb3d94c53dca9 SHA-256: 49bb967ec04574e50b6f35a5ee25a2dc3edc81e0049d4b228e6546ef849f795d
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely used to distribute further malicious content or phish for information. The presence of these links suggests an attempt to redirect the user to malicious websites, likely for the purpose of downloading additional payloads or conducting phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/strik?utm_term=argumentative+essay+definition+pdf PDF link annotation
    • http://kozlo.space/iron_carbon_phase_diagram_questions_and_answers758s6.pdfIn PDF document text
    • http://eurofamily.pro/377297061193pd3e.pdfIn PDF document text
    • https://cdn.sqhk.co/gasariba/hftAgdO/free_fire_hd_wallpaper_for_pc_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tofatuxurejo/rFhehgh/alien_invasion_adventure_3d_pics.pdfIn PDF document text
    • https://cdn.sqhk.co/xunixenovapi/MKib9s2/tobinibawi.pdfIn PDF document text
    • http://uablog.website/newudifamidelufafefde1w.pdfIn PDF document text
    • http://mojenisijita.mywebcommunity.org/netokegifelime.pdfIn PDF document text
    • http://dommasters.site/90556507654p463r.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwumixe/6qiciaC/gekupoxigemo.pdfIn PDF document text
    • http://bt-management.website/verifone_mx915_factory_resetb4tyg.pdfIn PDF document text
    • http://ruxuzosok.mywebcommunity.org/83482204959.pdfIn PDF document text
    • http://rivilidopu.medianewsonline.com/mathematical_reasoning_questions_with_answers_in_hindi.pdfIn PDF document text
    • http://vegofejolafud.mygamesonline.org/65516249922.pdfIn PDF document text
    • http://ericksandoval.com/eso_crafting_leveling_guidewfmwq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/56ee9db0-bad3-45d3-bab6-f3adb5c1edd1/bass_tracker_pontoon_boat_accessories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7eadb162-6189-4d49-9db5-af5d275e2166/56038369340.pdfIn PDF document text
    • https://5663e088-3595-439c-971a-5873693bee35.filesusr.com/ugd/e98895_05ece02bb0194185bbf8d6d25591d57d.pdf?index=trueIn PDF document text
    • https://eda93683-a6ca-45e9-8056-ca7adea7f1dc.filesusr.com/ugd/d655db_051f1f4318be455495f0f7bbf93dde73.pdf?index=trueIn PDF document text
    • https://d102a0f2-001f-4998-bb0a-88ac30ac05b5.filesusr.com/ugd/771ea4_0a15f9283f414b02853e537002c3e150.pdf?index=trueIn PDF document text
    • http://siniligavaxuvul.onlinewebshop.net/twilight_graphic_novel_volume_2_read_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3648c1ba-1ed0-49a6-9ab4-15836a630119/la_carta_a_garcia_completo.pdfIn PDF document text
    • https://07d68bf2-0661-47e2-9ffe-eae068a071af.filesusr.com/ugd/fef806_8ce2da1d39f24b3f92c2c459f086a5b3.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_off000123fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123FE 5480 bytes
SHA-256: f14f7f5fc1760fe74f01ff30fc0d916557474ed08d113842e61690d76c96b4ba
font_01_sfnt_off000136a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136A1 11024 bytes
SHA-256: 1a7ee0135d2319bb58b63814d96dc49b56823e20a18e9bf4a033cc94098d37f1

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