Malicious PDF — malware analysis report

Static analysis result for SHA-256 87b279833ab0a568…

MALICIOUS

PDF

73.9 KB Created: 2021-02-21 02:34:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 70b805dcc026f0f009b2d1f75cfcd77d SHA-1: 1ff3758282f53afcb3d361f99cf2ac825a1ca3e0 SHA-256: 87b279833ab0a5687b6f9c0d983741c7e93df0afacbff70b8e8023a9e53776ca
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/aws?utm_term=unity+asset+store+top+down PDF link annotation
    • http://bumadodari.iblogger.org/weight_training_chart_for_beginners.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368748/normal_602f460738e2c.pdfIn PDF document text
    • https://kuvixirizu.weebly.com/uploads/1/3/0/7/130739951/tubuzodugu-tofufipos-dewegorepe.pdfIn PDF document text
    • https://rovizefodizare.weebly.com/uploads/1/3/4/3/134309954/zifiparebewokuv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445877/normal_600485bd02cab.pdfIn PDF document text
    • https://piroveda.weebly.com/uploads/1/3/2/7/132740505/b5d0fee938dacf.pdfIn PDF document text
    • https://naxofezuwu.weebly.com/uploads/1/3/5/3/135396878/degoroveratez_fekuvatise.pdfIn PDF document text
    • https://jatilupek.weebly.com/uploads/1/3/4/4/134491857/8db2131580.pdfIn PDF document text
    • https://volejodanuba.weebly.com/uploads/1/3/4/5/134593723/lunevudevijov.pdfIn PDF document text
    • https://zizujegaduxopur.weebly.com/uploads/1/3/5/9/135972979/lapan_xaxovo_vopuxojigax_wefeziturob.pdfIn PDF document text
    • https://jonolepazom.weebly.com/uploads/1/3/4/5/134520471/6924747.pdfIn PDF document text
    • https://rulovuwupe.weebly.com/uploads/1/3/5/3/135386045/getubufosim-dufezob-goxawoxamu.pdfIn PDF document text
    • http://fotobaruti.22web.org/mojonibexu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469630/normal_601f1b2b0ffde.pdfIn PDF document text
    • https://zuwumepegowivos.weebly.com/uploads/1/3/1/0/131069935/7ff5b5e64.pdfIn PDF document text
    • http://gikadoketu.iblogger.org/60714895792.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dupula/mcdonald_s_menu_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/bootstrap_template_admin_panel_free.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e48c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE48C 5104 bytes
SHA-256: 4ebfc62ed14b167a576d55a9f4e2477d653369d9e26c69c633c4ed477b6e2d39
font_01_sfnt_off0000f613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF613 10684 bytes
SHA-256: b326c73a825d4b52c0d0d7d4f8496667f1f88a8e73102306c830efb0357686b2

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