Malicious PDF — malware analysis report

Static analysis result for SHA-256 21c7f2e2ee140114…

MALICIOUS

PDF

66.4 KB Created: 2021-02-14 16:58:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: b1cbfe7fd6f1eade1d10600a24c23283 SHA-1: 8a53ee9dd95ffda1ccdb24364f9569bb02d3c44c SHA-256: 21c7f2e2ee14011405cfedd34a2af9afb55e31ce584d5a4b3aa1e03792029984
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bologen.ru/aws?utm_term=kumpulan+lagu+beintehaa+antv PDF link annotation
    • https://gatojodegapov.weebly.com/uploads/1/3/1/6/131637656/kipilafoxana_fajuxemu.pdfIn PDF document text
    • https://pegiromilu.weebly.com/uploads/1/3/4/6/134683304/biluvetopovolagodode.pdfIn PDF document text
    • https://detaxotipag.weebly.com/uploads/1/3/4/7/134730838/6e23b.pdfIn PDF document text
    • https://jebelobuf.weebly.com/uploads/1/3/1/4/131452997/gawiwanolamisa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505699/normal_5ffb61cd9acab.pdfIn PDF document text
    • https://kozamewibigox.weebly.com/uploads/1/3/0/8/130874388/sulazinukiwu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470832/normal_5fee9c75ca07f.pdfIn PDF document text
    • https://peziwotikiju.weebly.com/uploads/1/3/4/6/134602895/506345.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475728/normal_6017370738458.pdfIn PDF document text
    • https://nepefesin.weebly.com/uploads/1/3/1/4/131410606/movexepinuki.pdfIn PDF document text
    • http://basomivunowa.22web.org/milifoxaboxipubijivazetor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405193/normal_5fe991cd22882.pdfIn PDF document text
    • https://vozozexofevufut.weebly.com/uploads/1/3/1/8/131871902/2811284e8d0f7.pdfIn PDF document text
    • https://zalinojawovuga.weebly.com/uploads/1/3/4/8/134886974/budewulegorinebipox.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/bubeto/wolfram_mathematica_10_activation_key_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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c75e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC75E 5128 bytes
SHA-256: 89e019b0a013fac659eb048afcae3bdd94a7ea6b13d24195bfb77e0cf60004b2
font_01_sfnt_off0000d8b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B6 10640 bytes
SHA-256: d00f1882b1c9b25fad3f4658e7eb310866b3fb564aeb1f75c1007869df9e3645

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