Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5f4a95f4fd44064…

MALICIOUS

PDF

81.2 KB Created: 2021-03-09 02:09:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 489a26ba60ff2c6de3ef29b75b105885 SHA-1: 4ff8b655e7bc3bc5f37dd6d059d934b0b848dbbd SHA-256: c5f4a95f4fd44064c84fde16faf26bad3685145ef9051423e12f61259e6188c2
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://nipisod.ru/aws?utm_term=3.5+prestige+classes+for+fighters PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445869/normal_60403c3d12f50.pdfIn PDF document text
    • http://tumuduwaju.mypressonline.com/dufonugifalasototebuzezu.pdfIn PDF document text
    • http://sutivetowit.mypressonline.com/niguwinerofikavukugode.pdfIn PDF document text
    • http://lamejix.scienceontheweb.net/xowinutod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416796/normal_602c9664ed65f.pdfIn PDF document text
    • https://namoturobiro.weebly.com/uploads/1/3/0/7/130739164/8f9ca410dadac75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503279/normal_602d5575ad28a.pdfIn PDF document text
    • http://faxusupovetek.sportsontheweb.net/10511328757.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4506159/normal_5fd8f599c55b3.pdfIn PDF document text
    • https://ruwadegefanum.weebly.com/uploads/1/3/4/1/134108857/8565825.pdfIn PDF document text
    • https://jatupixi.weebly.com/uploads/1/3/1/3/131398141/77d36fd.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/37d83082-5101-4ca1-bf60-80e7f9258994/78358014885.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27bfe201-8858-4583-9f04-e6a67c6fb30d/loteniwepexexap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b8651cc-6ec5-4f15-8b80-95c4027e48d4/best_sewing_machine_for_free_motion_quilting_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/129fbbd2-b0ba-4440-ac53-15f72e4f6177/datejifejojamena.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fa2ddfd-5f12-4423-b6fc-be42e19b9baa/xuzurutamabesigevagunugij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9009e9ab-3dbd-4879-a026-7bf29dcfeaac/mofexukif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdb2c2e1-cf11-4edc-a6f2-049cacb7cb24/bopokerudomunupu.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_off0000ff50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF50 5500 bytes
SHA-256: 2f1383dbe47e55649865135cd01e96f4793464d1c3c95f0fbc7d79ba11a1067c
font_01_sfnt_off0001120f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1120F 11144 bytes
SHA-256: 9d830bfa5b265c77003639aa18b93a91c04ed6cdf156a91e24b56d29827244d3

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