Malicious PDF — malware analysis report

Static analysis result for SHA-256 de37d5374ed04ed0…

MALICIOUS

PDF

70.2 KB Created: 2021-02-04 19:52:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 4641eb9b08d2d7f9086dfff90d5fdbf7 SHA-1: eee7c9ca69f1220c00d14bc841b57056523d6f3b SHA-256: de37d5374ed04ed05de16bf58ceb3796be42d0831ebba590a9cb7c32f9630ca0
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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/wb?keyword=target%20bed%20sheet%20sets%20queen In PDF document text
    • https://dulewidojupetor.weebly.com/uploads/1/3/2/6/132695372/mexeloxowotugi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370744/normal_5fecc4d2a4bb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413866/normal_5fe623c156b30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373987/normal_5fe90e1355d9d.pdfIn PDF document text
    • http://evromotors.net/zorawewb0rx.pdfIn PDF document text
    • https://dipilewojariwu.weebly.com/uploads/1/3/2/8/132814651/patunogemowozu.pdfIn PDF document text
    • http://krokoboko3.xyz/catholic_bible_malayalamf2lzy.pdfIn PDF document text
    • http://deemonatrafik.xyz/wojifubukoviletusamug4whxl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448103/normal_5ff4e24d35718.pdfIn PDF document text
    • http://heleogose.online/duvipojymle.pdfIn PDF document text
    • http://com-copyrighit.com/bearers_of_the_black_staffrcy4j.pdfIn PDF document text
    • https://namosupegu.weebly.com/uploads/1/3/4/3/134313644/6613667.pdfIn PDF document text
    • http://4338bacchus.com/bugaropakp97pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451563/normal_5fe769c47919d.pdfIn PDF document text
    • https://vixugusimuxomuj.weebly.com/uploads/1/3/0/9/130969476/8b137dc7.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_off0000d398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD398 5272 bytes
SHA-256: 00f72f45faa899a484b3397888024fdacd4fe6a244ead910b6f73e08ac2dc354
font_01_sfnt_off0000e56d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE56D 10964 bytes
SHA-256: 956c9140bb1df800e9ecf3c1cdde8e6e31316a03ef02b572681e3492bb286bcf