Malicious PDF — malware analysis report

Static analysis result for SHA-256 96106a0c04c55fb2…

MALICIOUS

PDF

40.9 KB Created: 2020-10-11 23:01:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: dbc1e69a7b74aab8a8306b030dd60909 SHA-1: a1d193c192a9079a3f326deb6fcfa7fe8c2a8575 SHA-256: 96106a0c04c55fb24b59c09c265e21cce392655f7c252791591caf5c574ffb11
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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://cctraff.ru/strik?keyword=beamng+drive+free+download+torrent In PDF document text
    • http://files.slusarenko.ca/uploads/1/3/1/8/131856815/0990aa.pdfIn PDF document text
    • http://files.claudianellmccoy.com/uploads/1/3/2/7/132710743/tovevopom.pdfIn PDF document text
    • http://files.codesafema.com/uploads/1/3/1/8/131856860/nuxuwozeziwewol-seduzowopurerax-sewivewikefexex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/1162/7944/files/nds_drastic_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8788/3165/files/linirazifepokogisapukaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9424/4008/files/karma_police_lyrics_tabs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/8417/8342/files/frases_de_la_vida_en_ingles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08b3b6a2-ac50-4ee5-877b-cc3a0e8d5163/wuvejakokomotipe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a39c09e-ba02-4d14-9b11-8b866081028f/26583109878.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d44450c1-a3df-4f10-9338-95b3b29c0c7f/kozapilesezida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e16a8c1-2463-4b2f-aef6-298b4d4711ed/33075203115.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01a32d91-8633-4972-b771-89f992716611/sowigadawusumoxedewepuxal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad99e206-e496-4198-b9ae-b803f43e0070/nakaxizogagudogexej.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_off000061f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F5 5248 bytes
SHA-256: 19f2865828c5ef9ea574e60e8197e89e271ba02001844559cbcadeed884386d5
font_01_sfnt_off000073cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73CF 10256 bytes
SHA-256: 5b3438dcac8bd046c965d790af2b1b5fd1286d46d6d55b15fda12981b9a90ec2

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