Malicious PDF — malware analysis report

Static analysis result for SHA-256 396d3c071761f2ce…

MALICIOUS

PDF

69.8 KB Created: 2021-01-20 16:55:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 00eb21dd84f524475b37c8685cb9af35 SHA-1: 4fcb76f04e82fd89594a5b84850a34a2738fda6c SHA-256: 396d3c071761f2ce668647a17e2fd6a7b5ac9ca9fe370e238c6f40963dcc17de
262 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/123?utm_term=intermatic+timer+manual+override In PDF document text
    • https://forupiwiwipugo.weebly.com/uploads/1/3/5/3/135349306/113b5e602.pdfIn PDF document text
    • https://cdn.sqhk.co/muxigatatini/8MgjrV6/minds_of_nations_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/powirafawume/UhbhgXd/railroad_crossing_signal_sound_effect.pdfIn PDF document text
    • https://xujopikaxatanow.weebly.com/uploads/1/3/4/8/134850499/fivigag.pdfIn PDF document text
    • https://cdn.sqhk.co/xutazazo/ciiXjfj/11077262835.pdfIn PDF document text
    • https://site-1243869.mozfiles.com/files/1243869/83871349574.pdfIn PDF document text
    • https://kazuvamelu.weebly.com/uploads/1/3/0/7/130738637/4b5ff627.pdfIn PDF document text
    • https://site-1179234.mozfiles.com/files/1179234/nunopeburukazawodiz.pdfIn PDF document text
    • https://cdn.sqhk.co/novupezezis/dViaeGh/bodokogo.pdfIn PDF document text
    • https://site-1177042.mozfiles.com/files/1177042/50352087769.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/mokuwanibof/business_budget_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/20023987500.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/67030679326.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/subenet.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/74788631756.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/ahir_status_video.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/catanzaro_informa_cronaca_ultime_notizie_incidente_oggi.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/dapuluvabirevaviwaluvezut.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_off0000d3c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C1 4904 bytes
SHA-256: 312cf6ed55e2beddf7f965bd9f821ad3141c67e21fa339c4586507e68ef369e7
font_01_sfnt_off0000e456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE456 11180 bytes
SHA-256: e8e7e48daca31360bf878673a67f428ad48ea80cd140b98b128d29133c4be55f