Malicious PDF — malware analysis report

Static analysis result for SHA-256 20662849999efc50…

MALICIOUS

PDF

80.9 KB Created: 2021-03-21 23:17:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c0c7c1d446abeae4d0827e7bb1df4107 SHA-1: 17867b24f72f29eb081f1268e08d27505002a8cb SHA-256: 20662849999efc50ee20ea1b7df7ca5ebb734a0d78081bf869514c804c17f5d1
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

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 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.
  • 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/strik?utm_term=how+to+program+comcast+remote+to+sony+tv PDF link annotation
    • http://titanof-filtr.ru/63844530631tihu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475987/normal_5fd6700c8f738.pdfIn PDF document text
    • http://reduslim-eu.site/bikikokis3gx8p.pdfIn PDF document text
    • http://centerbluebadge.com/49518693285rri54.pdfIn PDF document text
    • http://select-get.top/wovodnqinj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467287/normal_603951947fb3d.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://0aed7b51-d02b-4864-a6bb-b478bb809667.filesusr.com/ugd/fbdaab_542b0fcabf894b53a7216546a027e435.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9cc9b19-932b-4511-88aa-322826282d78/what_will_kill_foot_fungus.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/zakupusegewilov.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/86195957141.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/3477613254.pdfIn PDF document text
    • https://f05e0dbb-21cf-40ea-8b71-00b8d6f49a3b.filesusr.com/ugd/b09e1d_c92bfc4a5ed9457999246b11df04ed4d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/broilmaster_p3_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f77a9eca-a5d9-4c14-9594-82030cd663a2/wilderness_survival_training_southern_california.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ce45fc9-e91a-4a4e-aab4-51b4476cc012/la_la_land_guitar_tab_bryce_vine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22f9e2b4-3d0f-4c47-8b90-6545c183e51a/89064802280.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae2a55ee-113e-4b2e-a54b-45dee93b68db/duo_therm_furnace_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02a3503f-ec10-4d66-898d-130c23ed1fe0/55772364540.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/why_cant_i_use_street_view_on_google_maps.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_off0000f1bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BD 5176 bytes
SHA-256: 8af231ef58e40e3fe10021232b9aaaa117c890455a13e6a7fc1cb4e2d9d4f4fb
font_01_sfnt_off0001034a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1034A 10852 bytes
SHA-256: adabddd9fed2b10c8be7f3b3fe6e0dc88c72942ebaee6f1dcc3789e4389464e8
font_02_sfnt_off00012838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12838 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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