Malicious PDF — malware analysis report

Static analysis result for SHA-256 1889cb44b7fcf53c…

MALICIOUS

PDF

68.2 KB Created: 2021-02-26 19:41:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 98f96fc52c348e48994736f0ce85cd5c SHA-1: 68723982814cfba28666c247af3d8a50e469a6ef SHA-256: 1889cb44b7fcf53ca581ce569c3f6efe0100071233431ca3775b126d65a8d340
244 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/award?keyword=economic+development+jobs In PDF document text
    • https://dutukoviwu.weebly.com/uploads/1/3/0/8/130873875/97e8438d89d9c9.pdfIn PDF document text
    • http://vk-settings-change.online/45536959018izz28.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466662/normal_5ff712e9c6012.pdfIn PDF document text
    • http://momentshop.space/mein_kampf_hrvatskibe57u.pdfIn PDF document text
    • https://vefavufarexuba.weebly.com/uploads/1/3/4/3/134315694/5535702.pdfIn PDF document text
    • https://sudarotabodubig.weebly.com/uploads/1/3/1/4/131407445/e5672a.pdfIn PDF document text
    • https://xufuluzigi.weebly.com/uploads/1/3/4/2/134266078/ditekoto-naxikegufew-xegeteletozaz.pdfIn PDF document text
    • http://zimezobot.getenjoyment.net/can_you_keep_a_secret_lyrics_utada.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383930/normal_6035a408110df.pdfIn PDF document text
    • https://buvujufa.weebly.com/uploads/1/3/1/3/131379824/nebajepevoxedum_timabowum_wakemubuwojis_duwobo.pdfIn PDF document text
    • https://jiwosanoxonu.weebly.com/uploads/1/3/5/2/135299962/af1ae8112d.pdfIn PDF document text
    • https://tubidurifubadas.weebly.com/uploads/1/3/4/8/134885002/lasixuniwipojuzajef.pdfIn PDF document text
    • http://worabipupe.mypressonline.com/what_is_gundry_md_diet.pdfIn PDF document text
    • http://jasazotinalol.mygamesonline.org/wifakaxolusatokogaro.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499319/normal_5fee740de9c9c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://diwavubodinaroj.myartsonline.com/30663448089.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_off0000cf10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF10 5144 bytes
SHA-256: b1a09f7dedc5bdbdbb8bf455c4058cd1531e609fd66a1efd1daa36dd6636ce4a
font_01_sfnt_off0000e08c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE08C 10524 bytes
SHA-256: 477c3c720c3bc4ed0139e938c90f1f54840a9f4644cdebdccf0a9df827b077d9

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