Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e76a4111274e6bf…

MALICIOUS

PDF

73.1 KB Created: 2021-02-14 00:43:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: e7de7c27b1f3daa7a24565a2679fb598 SHA-1: f6b7b6c81248768aa94db920bbb24b79c46c6787 SHA-256: 8e76a4111274e6bf389eca16b48b7ca934274bd645c422a5725456292c52a588
216 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://seumenha.ru/wb?keyword=how%20to%20receive%20android%20messages%20on%20ipad PDF link annotation
    • https://cdn.sqhk.co/kobadaxo/hbGeKeO/checkers_free_burger_2020.pdfIn PDF document text
    • https://wuzovogupo.weebly.com/uploads/1/3/4/7/134720757/1552011.pdfIn PDF document text
    • http://myfoxing.online/83271278633qq4eg.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/livivuvuwugeb/41533311966.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/lodaropipimidil.pdfIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/swiftkey_pro_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/desolation_wilderness_fishing_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/amazon_kindle_ebook_formatieren.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/74428737714.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/79618982577.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/lagu_brick_by_boring_brick_acoustic.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/bili_bili_akh_teri_sohniye_song.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/contemplate_about_something.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/86978174555.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/flightradar24_apk_here.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_off0000e068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE068 5476 bytes
SHA-256: feb646c532ceef66213eae5247def819a2e993b09159acc134a2c72bd8d47b1b
font_01_sfnt_off0000f30a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30A 10664 bytes
SHA-256: e1e8fbc207df3574e6467f9c1a6f9813c2fc4a80ab007b5819424d0fff8c2304

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