Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3f16ae08c7206c1…

MALICIOUS

PDF

72.5 KB Created: 2021-01-25 13:41:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 55490e6c38900e5744c03cd99bcf0fd0 SHA-1: 65d63c4ae7fa6bad1d1e3e44ebb1dad736587431 SHA-256: c3f16ae08c7206c1aad4533ed401b4e2eeb4cf7fd7a583cbc289be76e5d8f54b
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/wb?keyword=download%20real%20steel%20robot%20boxing%20champions%20mod%20apk In PDF document text
    • http://moneymaya.site/mebedipa5n4hb.pdfIn PDF document text
    • https://tulixepatezapik.weebly.com/uploads/1/3/4/9/134902644/dobaluxona.pdfIn PDF document text
    • https://reropazorulofo.weebly.com/uploads/1/3/4/4/134437501/f06650.pdfIn PDF document text
    • https://fesomexipilajuj.weebly.com/uploads/1/3/3/9/133997099/4425723.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380854/normal_5ffcdf5bec888.pdfIn PDF document text
    • https://kunoloxudiruk.weebly.com/uploads/1/3/4/7/134767428/jefatupuviwijikejige.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486743/normal_6004f809075b3.pdfIn PDF document text
    • https://cdn.sqhk.co/rivitovolu/djjKhhH/2377348008.pdfIn PDF document text
    • http://realnoe-obshenie.online/sharpen_pocket_knife_with_sandpaperriv2z.pdfIn PDF document text
    • https://cdn.sqhk.co/zazavoxujub/e05VLif/tiktok_video_downloader_without_watermark_apk.pdfIn PDF document text
    • http://vivoxasoro.22web.org/dujerejan.pdfIn PDF document text
    • https://vunafenivanisip.weebly.com/uploads/1/3/5/3/135303543/xelogawikifuj_pegowukadal_sizubogezuz_ruwivu.pdfIn PDF document text
    • https://varalege.weebly.com/uploads/1/3/0/7/130738576/rupuw-foripil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455658/normal_5ff8124c201f8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tawexega.epizy.com/informal_vs._formal_writing_worksheet.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_off0000dd3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3B 5852 bytes
SHA-256: 1fb1d40722dfd3d0e3e527fae29bf3fc8bd626877505cf06ae8d1b6401d8988e
font_01_sfnt_off0000f113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF113 10496 bytes
SHA-256: adb3de0a86f804400ef28d336424df12794c73eebd3b10b16db5fcb7dddb4e4f

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