Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cc9c37d4d25d061…

MALICIOUS

PDF

77.0 KB Created: 2021-03-17 18:20:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: b9dea41653eb9f826c1d31459aa77743 SHA-1: 691732618f07c4631902d1fb56c0bea8d4703328 SHA-256: 4cc9c37d4d25d0616b658781280e0789c1ffcc99b1ef95b8cd3cce71ebc6302a
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains heuristics indicating it's a phishing lure, specifically referencing 'free gems' for a game, and links to an external redirector URL. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the overall pattern points to a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/wix?keyword=harry+potter+hogwarts+mystery+free+gems+ios PDF link annotation
    • https://cdn.sqhk.co/tuseliwi/WXY8BqP/24902422954.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414867/normal_602d4bdb7226b.pdfIn PDF document text
    • https://cdn.sqhk.co/kemivabesu/jedhejd/61905805561.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448129/normal_6024817c9bf29.pdfIn PDF document text
    • http://rowowevu.mypressonline.com/digitech_gnx3_review.pdfIn PDF document text
    • https://cdn.sqhk.co/wizevomorofe/4ifijpx/is_phage_therapy_legal_in_the_us.pdfIn PDF document text
    • https://cdn.sqhk.co/toxodabatot/SB0gejg/63519942209.pdfIn PDF document text
    • https://cdn.sqhk.co/kajutizikodu/gjghjzV/hay_day_cheats_download_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4504922/normal_5ffe440e3d1f8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450003/normal_5fffb140b0ff5.pdfIn PDF document text
    • https://cdn.sqhk.co/pijuvedozuw/ggjjgh0/real_steel_wrb_championship.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425727/normal_6005a98460e73.pdfIn PDF document text
    • https://cdn.sqhk.co/rizijuwet/iijjShd/51710013242.pdfIn PDF document text
    • http://fuvisetitisenon.mypressonline.com/mpsc_blank_answer_sheet_format.pdfIn PDF document text
    • https://cdn.sqhk.co/moxinivo/1nOElif/bad_piggies_2-_26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478926/normal_5fd2cb8177b59.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/ab114ea9-106b-4b46-9ca9-ce7a524b3fa8/43470897301.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9db83e29-0d2c-491e-9a7d-444412f6df31/cuando_se_empieza_a_rezar_la_corona_de_adviento_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/596b9b56-8d56-4212-8c8a-180ad611f657/who_has_the_slowest_40_yard_dash_in_nfl_history.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_off0000e859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE859 5440 bytes
SHA-256: 18e177743c3353e4061477047d3e2d77cf5f5967c572faed85e7f798afb3730d
font_01_sfnt_off0000face.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFACE 13212 bytes
SHA-256: e1f8caef64d7a6c7a2550f83c17f25a3bda98706f0e2d680f47a8326318b8e8a

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