Malicious PDF — malware analysis report

Static analysis result for SHA-256 74ef4e2bc2c79296…

MALICIOUS

PDF

41.8 KB Created: 2020-11-08 15:14:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 32758b6967282a821ea75aebf0daee6b SHA-1: 0ace867ce4ccbf2870a0cf1fe6fa15e9f30ae5d9 SHA-256: 74ef4e2bc2c7929612fcb4e510717a9eecf75f8b99df73f6a74f5f5a0810ae23
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://traffmen.ru/123?keyword=pokemon+ash+gray+download+pc In PDF document text
    • https://cdn-cms.f-static.net/uploads/4420239/normal_5f988e4bcf65d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454048/normal_5fa396aef0222.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366408/normal_5f8a71d0cad18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367914/normal_5f896eefd6e1d.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/dowavelaxam/muduvenazazusa.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/slotomania_mod_apk_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/fojamuzevevobenelafusot.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/biworejeririkopanotada.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/50479640626.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a032f8d6-1f31-4a5e-af37-9782ee0d9968/lg_65ef9500_oled_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/rightsize_smoothie_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/banijugoniragom/5233762309.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_off000060cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60CB 5744 bytes
SHA-256: d7c4e9087d54315dcee72af46932a9b316de129cb999717c09544237f7803570
font_01_sfnt_off0000744d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x744D 11920 bytes
SHA-256: 31f299dcf1c47bc00059e35f38bffe1fcdaeb6ac4287a03df79e87417aee6c75

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