Malicious PDF — malware analysis report

Static analysis result for SHA-256 812000a7ebc9c04f…

MALICIOUS

PDF

78.7 KB Created: 2021-02-08 18:05:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 19b789519c4ba59c0c8760a346f3e247 SHA-1: 5df2c2ccd44223b4572f2a28f25ac2fee9ea4a14 SHA-256: 812000a7ebc9c04f9ae02ce42ed341f19a3929f38bd9ab569f8333f5c37180e7
194 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=schedule%20change%20template In PDF document text
    • http://pasendapp.online/glary_utilities_5_freedyci1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424985/normal_5fe05c66bdf99.pdfIn PDF document text
    • http://pedalini.club/installer_un_clavier_azerty_sur_android6zl56.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392472/normal_5ff6710b4928e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421937/normal_5feccdcd64e7e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403417/normal_5fc7745210c64.pdfIn PDF document text
    • https://cdn.sqhk.co/vajirasavuz/Hjjjazx/jofob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413239/normal_5fe6be7c343cf.pdfIn PDF document text
    • http://matteset-spon.space/migususumosezovooth2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451225/normal_5feb5cb40a554.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367313/normal_60078e5423571.pdfIn PDF document text
    • https://cdn.sqhk.co/jutusaxibu/eja5vih/fosujudulavabudatunal.pdfIn PDF document text
    • http://itprod.space/tenawerevopozipukejfyx4.pdfIn PDF document text
    • https://cdn.sqhk.co/wadelovelo/gpmcYx6/strategic_planning_jobs_remote.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bokelur/siwidakibuduwa.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/canon_canoscan_lide_300_driver.pdfIn PDF document text
    • http://nexofemexer.epizy.com/email_template_outlook_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/65209262897.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_off0000f68e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF68E 5316 bytes
SHA-256: b55cf4691aee1e5e7ae805156ea5f45413c6cf85a67ab7e28f832973c7e253f9
font_01_sfnt_off0001087c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087C 10944 bytes
SHA-256: 15356fa184c8b2770593aca1f25fc5f85279525e78c633bff95e9027509e2682