Malicious PDF — malware analysis report

Static analysis result for SHA-256 086743d5a258a23d…

MALICIOUS

PDF

68.4 KB Created: 2021-03-07 09:29:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: fa973aa6b423e79e231cdecb42efae3a SHA-1: f7a3e73e7d4ab1ad205d9112805b028d1a869a7a SHA-256: 086743d5a258a23d98d2b8364ec615f240e39fd7643e97561c3d2f604d51d691
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://fokemale.ru/award?keyword=common+core+standards+california+ela+7th+grade PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408588/normal_5fe9b5d55c279.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423453/normal_60233f3c7e6da.pdfIn PDF document text
    • https://tuxutumixebapi.weebly.com/uploads/1/3/1/4/131438514/tibir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451930/normal_6036aa0ce55f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461232/normal_603be47751b7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489595/normal_601b19c304a6d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487663/normal_5fc79c4009372.pdfIn PDF document text
    • https://kupowenip.weebly.com/uploads/1/3/4/0/134042521/pakuguxig.pdfIn PDF document text
    • http://tevuvisena.iblogger.org/make_a_police_report_online_uk.pdfIn PDF document text
    • https://jabifuvos.weebly.com/uploads/1/3/1/0/131070291/d9f33b.pdfIn PDF document text
    • https://lenapejasuma.weebly.com/uploads/1/3/4/7/134749539/3afbe82eea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404308/normal_5fd6fe25bfe7d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369487/normal_5fcbfb22cecc8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://df9240ce-57b4-430e-a582-521170ca5232.filesusr.com/ugd/10b03a_c39482ed1a604a75ae7b257f2eac8f9a.pdf?index=trueIn PDF document text
    • http://lokakowevokeb.epizy.com/fejodirukadebiru.pdfIn PDF document text
    • https://bc260b4e-efc2-469d-9102-9c7234992d76.filesusr.com/ugd/b1b3ad_c033e10efd104713971f7b030fddd4fa.pdf?index=trueIn PDF document text
    • https://91313464-3f42-441e-b0e8-b27065d471ad.filesusr.com/ugd/ee9d3f_9e7bb2248c6a408b86fdc161fba8ddd2.pdf?index=trueIn PDF document text
    • https://c931c956-7f53-4e4e-96dc-27d7f003ba63.filesusr.com/ugd/b80c10_dc019797c17c41b9848f4544916b7181.pdf?index=trueIn PDF document text
    • https://cf176ec6-4820-456b-adf9-61e5f06c968f.filesusr.com/ugd/43d598_269ab851feff4607be0fe46f291b273b.pdf?index=trueIn PDF document text
    • https://123949be-7110-4ba3-a240-a7df06fb38ce.filesusr.com/ugd/80fd5d_096ec4b8552d47ca9bc58b7e6184ce9b.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_off0000cf7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF7B 5420 bytes
SHA-256: 4bcbedc31d2589f09250138c30c09af9a61e82325256ea3b786aea60b8ffe742
font_01_sfnt_off0000e1c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C1 10092 bytes
SHA-256: ff629aefff56ee380ec9af77aad36040e758733b2f78d117e899fe488b929a3b

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