Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ba71f1bd541ad55…

MALICIOUS

PDF

88.1 KB Created: 2021-02-19 17:46:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: c2ea9f452a9fcbcedb676eb45da5d169 SHA-1: bff4343f889227f6662567d191639492fa56a631 SHA-256: 7ba71f1bd541ad55bb75efa6486e693cac7e10efd7b01a65e292ca121a8b8e4b
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/123?utm_term=star+trek+enterprise+ship+name In PDF document text
    • https://felekiki.weebly.com/uploads/1/3/4/6/134689652/90c1ab024ce0f5.pdfIn PDF document text
    • https://cdn.sqhk.co/nenutipu/dDWjhig/88632417878.pdfIn PDF document text
    • https://kolijegidixut.weebly.com/uploads/1/3/1/3/131379325/waxoratoku-nejuninonimuwik-fulimerubasozej.pdfIn PDF document text
    • https://cdn.sqhk.co/xukerejolar/WhaTgh9/santorini_restaurant_miami_menu.pdfIn PDF document text
    • https://timifuxi.weebly.com/uploads/1/3/4/6/134676324/8608324.pdfIn PDF document text
    • https://vokefepafox.weebly.com/uploads/1/3/4/3/134333292/7b5296d517.pdfIn PDF document text
    • https://faxarumi.weebly.com/uploads/1/3/1/6/131606834/patiju.pdfIn PDF document text
    • https://sojagifuwolu.weebly.com/uploads/1/3/4/6/134689160/padilosojozi.pdfIn PDF document text
    • http://kelirifuwa.22web.org/vewarukogasejepukuwaju.pdfIn PDF document text
    • http://kosodidaxelo.22web.org/13540491761.pdfIn PDF document text
    • https://kusavavatixe.weebly.com/uploads/1/3/4/8/134878613/tiwepaz-pipif-muzamavuwuso.pdfIn PDF document text
    • https://cdn.sqhk.co/linotepibubi/gdBNPTV/xinajikuratorisomaxadu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468268/normal_601304d8b966d.pdfIn PDF document text
    • https://wugepazi.weebly.com/uploads/1/3/4/3/134348030/4802448.pdfIn PDF document text
    • https://cdn.sqhk.co/vifutetax/hjhjgiz/darkness_rises_pc_download.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_off00011d8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D8F 5192 bytes
SHA-256: 3c6b6daef1d9a1d256c49cbe9bb8e51579cc89063cc5f4709a73185a37012df6
font_01_sfnt_off00012f10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F10 10764 bytes
SHA-256: 812a33b6dd744012245479862d46bbd5ba2cfea25be7ae2fc59059deaba0016f

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