Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bbb7c0beb659cfa…

MALICIOUS

PDF

79.5 KB Created: 2021-02-17 14:16:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 0d97e14d075f516ec62ce613843fc154 SHA-1: cefe72b673581f21968c84a4b2988fc535947cee SHA-256: 8bbb7c0beb659cfa3888c4f87d39e4bd300faf649e907f4776af08dc33ac46da
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains an external URI and an SEO redirector link, both pointing to 'https://seumenha.ru/123?utm_term=max+lucado+net+worth+2018'. This indicates a phishing lure designed to entice users to click on a link, likely leading to further malicious content or credential harvesting. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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/123?utm_term=max+lucado+net+worth+2018 PDF link annotation
    • https://cdn.sqhk.co/goluxewimabu/XtiGWhj/distance_measurement_app_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzudulo/17hdLgg/arcade_belts_amazon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477401/normal_60273daf2855f.pdfIn PDF document text
    • https://cdn.sqhk.co/petebeki/hjf9jac/bloons_tower_defense_5_hacked_ninja_kiwi.pdfIn PDF document text
    • https://cdn.sqhk.co/zisuzunon/fjgU4gh/aerial_video_of_bahamas_damage.pdfIn PDF document text
    • https://cdn.sqhk.co/suwezuzifu/hdgihzJ/facebook_marketplace_local_pickup_only.pdfIn PDF document text
    • https://cdn.sqhk.co/ninivaxibab/gHshjhf/top_100_funny_animal_videos.pdfIn PDF document text
    • https://cdn.sqhk.co/pubamegumox/Ujb3Zjd/52923717366.pdfIn PDF document text
    • https://cdn.sqhk.co/zofizitene/sgdvLua/fewijavexi.pdfIn PDF document text
    • https://cdn.sqhk.co/wamiratena/eicRxEc/8709017466.pdfIn PDF document text
    • https://cdn.sqhk.co/sopiloroda/dvhgdgi/nedamek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sexikiti.epizy.com/65474913432.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/definition_of_transformational_leadership.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/18281795384.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_off0000f62e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF62E 5536 bytes
SHA-256: 2d4c7df6cb346a51994e8e85dfdab32b4815ca55305ed978f9fc9cbbdb068208
font_01_sfnt_off0001091c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1091C 12816 bytes
SHA-256: b3fe477755588a00ab56313bbd96555db0af098390da3def89ce9c4fd1fa7de1