Malicious PDF — malware analysis report

Static analysis result for SHA-256 90dc8156cd18f336…

MALICIOUS

PDF

35.9 KB Created: 2020-10-26 17:29:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 165f2a3d1f2c15cab03d15154815a280 SHA-1: eb1996cc0d103af26413d888fc788d24b73bc6d5 SHA-256: 90dc8156cd18f3368e7f4fc9ae591dedb8ff37e239b5c644f66629b2e7425493
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ttraff.com/pify?keyword=gcse+arabic+books+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371497/normal_5f8fa4620ff3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377931/normal_5f93c2866dc17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386842/normal_5f930e4a4942d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377120/normal_5f9332488bf98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374203/normal_5f9088e1e49fe.pdfIn PDF document text
    • https://bofezukidev.weebly.com/uploads/1/3/4/4/134464138/sonunobusoxalari.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/wawakonulunupel.pdfIn PDF document text
    • https://reredutubonuki.weebly.com/uploads/1/3/0/7/130775370/datukikew_fokagopa_jebiduvawov.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/tezitafef_jojexax_rapiz.pdfIn PDF document text
    • https://wegotutitupal.weebly.com/uploads/1/3/1/4/131453182/nedil.pdfIn PDF document text
    • https://xalipifizipig.weebly.com/uploads/1/3/1/3/131379045/varuxavir_betux_fekaponinetase.pdfIn PDF document text
    • https://rogidalot.weebly.com/uploads/1/3/1/6/131636841/todatupuzoj_xupufokorituf_gifinikuvaror_pozuwixonu.pdfIn PDF document text
    • https://nikuwexipamojag.weebly.com/uploads/1/3/0/8/130813731/kemitunoxe.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/4c1951d7-eed2-4e80-b7f9-05634674f2e3/bagedu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43e66092-2ee9-46d4-94cb-25212138f3f8/39923569164.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e7661c4-9fe2-4b03-b986-badb598884dd/posoxuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/482fc96a-2ab5-488f-8392-65ad1890d05b/dowura.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1733/7536/files/sisujot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8980/3461/files/gozinafedezise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1350/4156/files/aprilaire_800_steam_humidifier_installation_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9359/9410/files/box_android_tv_play_store.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee4f3a1d-8d6d-47e3-b0aa-0b9b9a1e1c79/56436743675.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f707da0-ae19-470f-8163-7fe84eeac5a9/kafasuvoraliviriwigav.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_off00004c0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C0F 5352 bytes
SHA-256: a32975c13ad2c75f560995998b85601ecd1a7b4b4b0436e55beab67ba80caead
font_01_sfnt_off00005e4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E4B 10936 bytes
SHA-256: 01cdd6d4ce38ca7902bfa5f404ffcdc1afb2f340387d5533ee305a99b2fd8aa3

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