Malicious PDF — malware analysis report

Static analysis result for SHA-256 e576436b8e553503…

MALICIOUS

PDF

77.4 KB Created: 2021-02-20 00:44:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 571977ea8b7694bf9a563391dcd0bae4 SHA-1: f5ac8d4a09a12a1b5d98e36fbb5139a501ba88a4 SHA-256: e576436b8e553503d21989175d2bdf7ef8dcba5c8cb1d7ad5b037febd25de9a8
196 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
  • 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.
  • 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.
  • 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://jottigo.ru/123?utm_term=why+is+my+fitbit+versa+not+connecting+to+gps PDF link annotation
    • https://cdn.sqhk.co/tajudozizif/fMETgcX/93910881699.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468843/normal_5fda58edb9bff.pdfIn PDF document text
    • https://cdn.sqhk.co/konafomaz/Q5ihbge/iphone.pdfIn PDF document text
    • https://tamipabofoj.weebly.com/uploads/1/3/4/8/134876193/723c2987e.pdfIn PDF document text
    • https://cdn.sqhk.co/wibetaxor/nJMdha7/59470368724.pdfIn PDF document text
    • http://teachersaid.fun/kazapetepuft8se3.pdfIn PDF document text
    • https://cdn.sqhk.co/pedidagow/hhfthha/xotibatumolifaxifigu.pdfIn PDF document text
    • https://cdn.sqhk.co/torujazelome/jfFnRHv/pizewutara.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452152/normal_6020bb5422b89.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/megujobemegor/lufabemetotipiliwaval.pdfIn PDF document text
    • http://biforobajimebug.epizy.com/invoice_template_html_css.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/printable_cartesian_plane_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/stock_market_trading_technical_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/39583805107.pdfIn PDF document text
    • http://jepisaf.epizy.com/88554156992.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_off0000f044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF044 5712 bytes
SHA-256: 8f133cd9b0eb83cf1fa585e29dc6fe50f83ba87a9d33cd1584df41a94a36cc99
font_01_sfnt_off000103ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103AD 10832 bytes
SHA-256: fb8161ea3f2bbf520adf6f056ec9b111fb03b1c1905c7d4a79f492a474514059