Malicious PDF — malware analysis report

Static analysis result for SHA-256 e29e1f2b8617e708…

MALICIOUS

PDF

67.9 KB Created: 2021-03-02 05:42:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 52401e93899f21233327895c15d07c18 SHA-1: 52f218c7e860f458ec78fed263fe5b76d3f24818 SHA-256: e29e1f2b8617e708218852115b53446c92a47815a46ed47126f1a33f8d83fefb
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://crophysi.ru/award?keyword=engineering+mathematics+ka+stroud+5th+edition+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4402707/normal_601ba0e94174a.pdfIn PDF document text
    • https://kimuremosov.weebly.com/uploads/1/3/4/7/134732255/zurozafom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394082/normal_5fd329ffc80a5.pdfIn PDF document text
    • https://cdn.sqhk.co/zifuvifiweva/Rm99gdY/read_sheet_music_app_android.pdfIn PDF document text
    • https://xagufiwukana.weebly.com/uploads/1/3/4/6/134694649/3433722.pdfIn PDF document text
    • http://bufo.online/77579640381sd7ta.pdfIn PDF document text
    • https://ratofesut.weebly.com/uploads/1/3/5/3/135304008/505f71.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/is_international_mail_coming_to_canada.pdfIn PDF document text
    • https://wipasajumavadus.weebly.com/uploads/1/3/4/7/134775966/5167240.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486983/normal_6022aedc2a17d.pdfIn PDF document text
    • https://tuwavufubuxa.weebly.com/uploads/1/3/3/9/133997694/kerugewojufi-gogizi-vedoka-dubawuginunonu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402721/normal_60021aab54b12.pdfIn PDF document text
    • https://kitomejefu.weebly.com/uploads/1/3/4/1/134108571/1388015.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_off0000c9b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9B4 5684 bytes
SHA-256: 9665895856271ae41a36ecff3297d117b0c3af3b3d6b82c0d20b100247690b0b
font_01_sfnt_off0000dcec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCEC 11044 bytes
SHA-256: e33385129474bf7b0a3b74e4a4f653d10430a59d0ab8f24db079e7b07cc0aa85

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