Malicious PDF — malware analysis report

Static analysis result for SHA-256 f45e9cb5c7971e5f…

MALICIOUS

PDF

192.6 KB Created: 2021-02-26 23:10:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 372e1882a43a739a84747436a8a38aec SHA-1: b23eefae74a2eb88a946fab302e9df4324fdf156 SHA-256: f45e9cb5c7971e5fabeed03d3ef67c5c55a513ff00dcdd4df1b47ed3a61ffe67
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 by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The 'PDF_SEO_UTM_REDIRECTOR_LINK' heuristic indicates the presence of an image lure that redirects to a URL, likely for phishing purposes. Although no scripts were explicitly extracted, the PDF structure and the nature of the heuristics suggest it's designed to trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=history+of+islam+in+india+malayalam PDF link annotation
    • https://cdn.sqhk.co/jurufovowufu/bP5hb9a/vector_despicable_me_direction_and_magnitude_gif.pdfIn PDF document text
    • https://xafituku.weebly.com/uploads/1/3/4/8/134863640/kizejepilodufup.pdfIn PDF document text
    • http://kunujunekedi.mygamesonline.org/61151923113.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450721/normal_5fcc36ae8c86e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418381/normal_5fecb89d8ce61.pdfIn PDF document text
    • https://bejokezogakuji.weebly.com/uploads/1/3/2/6/132695802/cc02075bb383.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383147/normal_6022da1962af2.pdfIn PDF document text
    • https://cdn.sqhk.co/poxirowo/hj4qHhg/beautiful_wallpaper_download_sharechat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501804/normal_602d8c14cacce.pdfIn PDF document text
    • https://cdn.sqhk.co/rigizisojix/hj4hfKn/neighbors_apple_tv_showing_up.pdfIn PDF document text
    • https://cdn.sqhk.co/vorebilifi/ggjchhe/drum_sets_for_sale_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/tedigedubemi/jeiiIMX/zatetejulibakovob.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454678/normal_5fe2f94c221cc.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/bejenosugede/nibimir.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/47835325209.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000299bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x299BF 5116 bytes
SHA-256: 2e9ea3b7ed0c4a4a66c20617d63a8883c085d73323a2a1bdf8faed525e65c1ee
font_01_sfnt_off0002ab16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AB16 14032 bytes
SHA-256: b7ed1882ae9258ea56b0cdc557f0a4aa5d6d1d98989f6532c90024c1644f7e0f
font_02_sfnt_off0002d67e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D67E 18112 bytes
SHA-256: b657673da17634a356726d7bb0fc0da260cd692fc683930f6bdf291e8f0cfbda

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