Malicious PDF — malware analysis report

Static analysis result for SHA-256 8abbb145ea31eab7…

MALICIOUS

PDF

40.0 KB Created: 2020-11-07 22:25:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 4827bd8289f789e13443806dc7c10d1b SHA-1: 24cd58568f1db550cdaad2f910eeeebd2e31b911 SHA-256: 8abbb145ea31eab73e3812d3eb53975175190df75768417501bfe59a222ed212
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://traffking.ru/123?keyword=unblocked+minecraft+free+for+school In PDF document text
    • https://misutinulil.weebly.com/uploads/1/3/1/4/131407711/9230109.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/365d74fa-0ee8-4ae7-b7d6-47eac181e18d/abel_danger_911.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e7d0352-8db4-4056-952c-373115e81155/peredusi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2558ffba-09e8-4a14-b784-029550dd73de/gogopugem.pdfIn PDF document text
    • https://dolixul.files.wordpress.com/2020/11/mubagodojem.pdfIn PDF document text
    • https://mutozofe.files.wordpress.com/2020/11/65548376527.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9b98408-adf4-42dd-8b63-5ca58fd9d75a/seguro_mdico_carrington.pdfIn PDF document text
    • https://katimovu.files.wordpress.com/2020/11/99671498994.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f50a8d7-2ba2-4d07-96e4-237f66a81f62/binimeke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dcb70b5-6403-4ac9-a47c-8222363d605b/mass_effect_andromeda_weapon_guide.pdfIn PDF document text
    • https://lodoxepal.files.wordpress.com/2020/11/vibinofa.pdfIn PDF document text
    • https://xeragefaruj.files.wordpress.com/2020/11/5017474185.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d843113d-2646-4934-bd49-d061cf1dc6e5/tomodow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0ea0470-65d8-4dd7-aa76-0bebbe6260a6/25947207458.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_off00005dd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD3 5456 bytes
SHA-256: d6bb43e77c87431e83d94d4e9e15b0636fe2c697e2ac0ac8812f54aec99694d6
font_01_sfnt_off00007039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7039 10116 bytes
SHA-256: 7c77b69cccf8ce64358325f1be69a3491f0de392d10bf1dbbf5f8c4760086042

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