Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b8e00a2d34224b7…

MALICIOUS

PDF

68.0 KB Created: 2021-03-03 00:21:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 868d011a4ba69bd4e547a7c8fbfc3d95 SHA-1: 3e2735a8716ff8fd54681b2d7310711766182198 SHA-256: 2b8e00a2d34224b7048ab8a63b2e13301ed858c3b63f30039044938c28549aed
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and a high-confidence ML classifier flagged it as malicious. It also includes a heuristic for an SEO redirector linking to a URL that appears to be a lure for free downloads, specifically mentioning 'minecraft water modpack'. This suggests the document is designed to lead users to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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/wix?keyword=minecraft+water+modpack PDF link annotation
    • http://usechambre.xyz/39682887815zkgpv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376610/normal_5fd389eb75b02.pdfIn PDF document text
    • https://cdn.sqhk.co/jukowejazus/hcFniey/32225047154.pdfIn PDF document text
    • https://cdn.sqhk.co/vodadavubex/hjjgd62/basketball_3d_wallpaper_app.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453560/normal_5ff209a91dc6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499334/normal_60399826b569c.pdfIn PDF document text
    • http://nout-sale.site/tasiwetujovuzumemokadi9jgna.pdfIn PDF document text
    • http://zuvels.xyz/15983319008nvnu3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374956/normal_60273e8b33c6b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501374/normal_5ffcfae0989ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393019/normal_600399c0d4b86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369183/normal_60277269bed81.pdfIn PDF document text
    • http://inostrana.com/cbse_class_12_result_2019lqore.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/penale/temurarijinanopiwetok.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/anjathey_movie_video_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/dictionary_of_archaeology.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/sathuranga_vettai_2_full_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/jbl_endurance_jump_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/59399828216.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_off0000cdc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDC3 5252 bytes
SHA-256: 91c0da41c78c81b8d446a48fa5cb07268789e9e7acd2647307fde54f6325fd74
font_01_sfnt_off0000dfb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB0 10360 bytes
SHA-256: add9721d82071651289eb7399f81d8ab5d71f2bd1fa852e17386aee5eed7c30f

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