Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a377512f5c2d22d…

MALICIOUS

PDF

69.8 KB Created: 2021-04-08 00:15:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 584e6f19ff57f9ad40b8510c1589e019 SHA-1: c18a1a6172571b09e91f56230c0924864ad2ebef SHA-256: 1a377512f5c2d22ddcbd06e16c3ebaab23c8a9f19ac495c28b2e9c1e958cca34
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing and trojan threat. It contains an external URI and an SEO redirector link pointing to 'https://dugedepap.ru/123?utm_term=jungle+adventure+2+game++uptodown', which is likely used to deliver a secondary payload or redirect the user to a malicious site. The document body, though heavily obfuscated, contains text related to 'Jungle adventure 2 game uptodown', reinforcing the lure.

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://dugedepap.ru/123?utm_term=jungle+adventure+2+game++uptodown PDF link annotation
    • http://dakekunagefasak.sportsontheweb.net/86650344844.pdfIn PDF document text
    • http://fawikenaxalu.scienceontheweb.net/dodukanu.pdfIn PDF document text
    • http://zunololanuxigu.sportsontheweb.net/bizeteximuxosit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481285/normal_5ff90dc3b186e.pdfIn PDF document text
    • http://jerimujolegem.medianewsonline.com/ruriwuvotenijolin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454822/normal_6015368315a87.pdfIn PDF document text
    • http://zovofuti.mygamesonline.org/big_data_fundamentals.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500417/normal_603b43e3632aa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446647/normal_5fceab1ba4887.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457272/normal_60500d067f5a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402956/normal_605b54061b027.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jatoxat.atwebpages.com/pseudomonas_aeruginosa_biochemical_tests.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/is_panda_express_safe_to_eat_while_pregnant.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/how_to_find_the_age_of_water_heater.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/84681662000.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/guru_nanak_dev_ji_biography.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/eminem_songs_list.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/inlaid_sheet_flooring.pdfIn PDF document text
    • https://s3.amazonaws.com/gapuruxumeg/jajofatimukaselafele.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/free_photoshop_actions_graphicriver.pdfIn PDF document text
    • http://zoligagomuwe.onlinewebshop.net/ap_eamcet_seat_allotment_2020.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_off0000d320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD320 5376 bytes
SHA-256: 68c348d20a5eb5c8a62a0ce9a64c233e4b6ea29b91ab548e9e4073209717d73d
font_01_sfnt_off0000e56b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE56B 10720 bytes
SHA-256: 0e2b232e85e2c5a730193fc539c87b98bd05df327b8dbe44dc5d78ac13dac25a

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