Malicious PDF — malware analysis report

Static analysis result for SHA-256 43d4837646493442…

MALICIOUS

PDF

73.9 KB Created: 2021-02-23 23:06:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: e329072620ee457725fccf509f6647c4 SHA-1: f5e3120717f9db8800627c3cc1ce7b795cc48dbc SHA-256: 43d483764649344244b4ead5cb9cf382e19d64e9e3a5ab9e66d0af63089fe033
144 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://baarspo.ru/wb?keyword=verizon%20quantum%20router%20update PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380522/normal_6029711475847.pdfIn PDF document text
    • http://opssmall.space/dizuderaxunibabelimexkz9sk.pdfIn PDF document text
    • https://cdn.sqhk.co/mokavokaven/hgjb9kf/25190276865.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416513/normal_600b6a8d08de3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492573/normal_600aabb8ada32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383804/normal_60316a279024a.pdfIn PDF document text
    • http://lumacy.site/zinomajufekopowuzalubxvmrs.pdfIn PDF document text
    • http://helpverifedbadges.com/gopijubojigivotugapay1q05.pdfIn PDF document text
    • https://cdn.sqhk.co/demexadol/Uhgggib/9062197752.pdfIn PDF document text
    • http://1eyvgo.xyz/tosixiq7crg.pdfIn PDF document text
    • https://cdn.sqhk.co/nobixapo/ahaFtUs/9146960223.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413457/normal_601a80afbc6dd.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/leributafa/15673000218.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/internet_explorer_for_apple_ipad.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/17869523078.pdfIn PDF document text
    • https://lifehacker.com/update-your-fios-In 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_off0000e6aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AA 5036 bytes
SHA-256: 8e03196af1de1b828a18ef58357c0571d6fcaffbaf9cef3b8ab44d6a5ccd5051
font_01_sfnt_off0000f7bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BD 10332 bytes
SHA-256: 6b579ed25f3b27fa239c2a5812068378312650be35d8016d159de6ed6be39a7a