Malicious PDF — malware analysis report

Static analysis result for SHA-256 243d13bde3a6975f…

MALICIOUS

PDF

70.2 KB Created: 2021-03-10 08:28:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: dd840c2fa056a6cdc119012434e28bc4 SHA-1: 813981c43408237a9e81d0ea97213eb901b9b094 SHA-256: 243d13bde3a6975f84116da2051ad763edd39ede2b87dc4cfdb429a9ae08791f
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://leonvi.ru/award?keyword=bocio+multinodular+en+pediatria+pdf PDF link annotation
    • http://wedipum.mygamesonline.org/cashier_training_course_in_durban.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462736/normal_5ff37551b8637.pdfIn PDF document text
    • http://gexomafe.mypressonline.com/rca_tablet_dvd_combo_car_charger.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408588/normal_603d31d191193.pdfIn PDF document text
    • http://ziwusis.getenjoyment.net/is_autocad_3d_software.pdfIn PDF document text
    • http://forajadafogaxuv.medianewsonline.com/86565137530.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460266/normal_60238e5ba3bc1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fefcf4f0-bf52-4086-adb3-b788df03f7bd.filesusr.com/ugd/da9d4c_2fffde331934490b8d71cce506b208c0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6244bea-2a4a-40e4-807e-a5fdf3a7363f/27892090500.pdfIn PDF document text
    • https://s3.amazonaws.com/sejakopa/9872654087.pdfIn PDF document text
    • https://737c154f-ca75-4484-807d-9d5c19d76377.filesusr.com/ugd/7e84b7_9a90ddb643e84598b782bc605de082e6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5393341-ebf3-488f-ab0c-32af0044f46d/vofigarofoku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f67c9ed-cd0f-45b3-a155-757873513104/42944811603.pdfIn PDF document text
    • https://dd67658a-cc17-4e1c-bca5-42bf299a485b.filesusr.com/ugd/07a440_9d106e944edf4399ab4a549f1f94663c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b840760-476c-4a98-9666-c89bae2ed911/remington_rebel_16_42cc_gas_chainsaw_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8f122fb-dc30-42a8-85bc-08f2b6fd4ee9/can_you_only_buy_houses_on_your_turn_monopoly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abcfbd50-6395-4eb7-a149-257de60770c9/58248792386.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/983688d8-9c9d-48ad-b35d-265b2fc6d635/14913928777.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/eau_guidelines_renal_cancer_follow_up.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DF 5172 bytes
SHA-256: 539be04b2aa94504b0ac7d9c96e4a1eb713971ccd49e0e53e6c7ae43632452f2
font_01_sfnt_off0000e85e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE85E 10356 bytes
SHA-256: f5b6c874be20dd83526a5488dd398b74a6ef1e598e9d8a2a304260da5c123e7c

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