Malicious PDF — malware analysis report

Static analysis result for SHA-256 f43588fdcd563cd0…

MALICIOUS

PDF

77.1 KB Created: 2021-02-22 02:01:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 94209ecd0f4136f3a4af30ac1360a100 SHA-1: ea889b68e768bb3bd118ea5932380df15aa21481 SHA-256: f43588fdcd563cd0a4de3921dd826c27f59de6b40a8985306f1571a1bfa70c7c
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/123?utm_term=how+to+count+10+in+spanish PDF link annotation
    • https://mibinataxufix.weebly.com/uploads/1/3/1/4/131438539/5809675.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419415/normal_603171570a96d.pdfIn PDF document text
    • https://juguzitusiketi.weebly.com/uploads/1/3/4/3/134372303/wifotafovan.pdfIn PDF document text
    • https://sisexalixigana.weebly.com/uploads/1/3/5/3/135323773/bevufemamoviwul_bajin_fimutariweli_lataded.pdfIn PDF document text
    • https://wokulenazaxur.weebly.com/uploads/1/3/4/7/134744474/sizemevapasodet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454420/normal_5fd80ec2a13e4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393772/normal_6008e85ed9497.pdfIn PDF document text
    • https://gidutuzewefira.weebly.com/uploads/1/3/1/3/131380066/rifebu-xilawarepal-walexawujuwu-gadafijije.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424951/normal_600695ed17cda.pdfIn PDF document text
    • https://dewubixire.weebly.com/uploads/1/3/1/3/131398231/423116.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368478/normal_600c7a1fe9996.pdfIn PDF document text
    • https://subokolabipu.weebly.com/uploads/1/3/2/3/132303028/3595919.pdfIn PDF document text
    • https://pokukumujipuk.weebly.com/uploads/1/3/1/8/131856200/zedemijuzo.pdfIn PDF document text
    • https://ravaratu.weebly.com/uploads/1/3/5/4/135401011/xifivid-sumub.pdfIn PDF document text
    • https://gawopina.weebly.com/uploads/1/3/2/8/132814119/zolexazetasironorawa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000eeb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB0 5140 bytes
SHA-256: 6835e96a68cfcf4b6e863af1fd7750dcb22fb2e697cb7b6a6dbd904ff648e859
font_01_sfnt_off00010043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10043 12008 bytes
SHA-256: 79eaa1cbca30a18fe061d4521e8db57db4ac6eabb820f47239c345f7dcd97054

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