Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b085ec15a85865f…

MALICIOUS

PDF

111.2 KB Created: 2021-04-01 00:35:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5e2c585cb8cb8f376d7b042012bc6d0b SHA-1: 56e49695aa684565d249af9f5530f995eeee8b19 SHA-256: 9b085ec15a85865fd9630b2d00875fab464cd2bf0ac1aa578cdb85d163d0d05a
166 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 0.9997

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://golowaki.ru/123?utm_term=comprehensive+agrarian+reform+law+tagalog PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377101/normal_602c5cecf36d9.pdfIn PDF document text
    • http://sibogufurab.medianewsonline.com/59138509880.pdfIn PDF document text
    • https://cdn.sqhk.co/jusulikipe/YjbicVf/furia_de_titas_1981_assistir_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496597/normal_604cdadc6530b.pdfIn PDF document text
    • https://cdn.sqhk.co/gepibilis/hchfijy/7980671418.pdfIn PDF document text
    • https://cdn.sqhk.co/xexerekija/6avPhiw/92838573691.pdfIn PDF document text
    • https://cdn.sqhk.co/javeduner/oidMEgY/88628172286.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420260/normal_6016126f173c9.pdfIn PDF document text
    • https://cdn.sqhk.co/legexere/7jhUSNC/camera_scanner_creator_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490746/normal_604c966352954.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/h0VNWfA/bivupozerajigi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://runuwug.myartsonline.com/12703564938.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bced6d7f-d4e5-485d-bb32-fc6c7eb3227f/which_wireless_dog_fence_is_best.pdfIn PDF document text
    • https://3e80c8bf-0031-4ca1-bfa9-4484641fefed.filesusr.com/ugd/08103e_c027b408488544bca8ea901fc2702915.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5763c0e0-4fb3-4cc4-b0fd-02f452c08243/best_ar_15_magazine_speed_loader.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e560c43-bf4e-4f10-a155-154da96a6f62/which_convection_toaster_oven_is_best.pdfIn PDF document text
    • https://88211235-bf86-4d40-a6ec-a052db2f682e.filesusr.com/ugd/94e5ef_17b6857736a2475bab5b782f46655733.pdf?index=trueIn PDF document text
    • https://6d5fec37-5936-4ae8-8938-03a86e982f09.filesusr.com/ugd/d4da64_f0a3847fef8c48bd8cc6372250fb4a71.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7fdaef3-a1b4-45d5-b58b-92de9790c55c/26649810644.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89132740-372c-41b2-be7f-3180ad8d604d/novivasamupixolid.pdfIn PDF document text
    • http://piwakitidi.onlinewebshop.net/zamoviko.pdfIn PDF document text
    • https://92fed17e-af34-466b-b3fe-38cd9ef27699.filesusr.com/ugd/192d58_fa1e08529d364ec69dd06c8c800b46e3.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_off00017559.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17559 5372 bytes
SHA-256: 3613d868f11a954cfb763412647d6fcd8a63b20b20858218858ada5068dc23f2
font_01_sfnt_off00018787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18787 12496 bytes
SHA-256: 92630104222f138855168b864edb840f55249c8720895d00512d9d010cbf4038

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