Malicious PDF — malware analysis report

Static analysis result for SHA-256 de300f491f7bd9c3…

MALICIOUS

PDF

153.4 KB Created: 2021-02-26 20:34:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: cecd1e550b146fd3140ee27adbea1c40 SHA-1: d3684f04eb2efd80d98b9cfbf06f758774faedc9 SHA-256: de300f491f7bd9c38f8ab244ef2653d69f9aa6347700978905ac6a45a2597051
136 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains an embedded URL that redirects to a phishing site, likely intended to lure users into downloading further malware. The document body, though heavily obfuscated, contains text related to 'wkhtmltopdf', suggesting it was generated by a tool that can create PDFs from web content, potentially for phishing purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://gimoguvi.ru/strik?utm_term=how+many+chapters+does+the+count+of+monte+cristo+have PDF link annotation
    • http://vowufijetapiko.sportsontheweb.net/diet_plan_to_lose_weight_and_tone_up.pdfIn PDF document text
    • http://mujudesuxiropa.sportsontheweb.net/wanigusomojiji.pdfIn PDF document text
    • http://lelekelosutov.getenjoyment.net/kotijaretovuvo.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/interior_design_styles_explained.pdfIn PDF document text
    • http://kadaxejob.mypressonline.com/how_to_clean_a_warm_air_humidifier.pdfIn PDF document text
    • http://kinemulawaw.sportsontheweb.net/89340168734.pdfIn PDF document text
    • http://jaralet.getenjoyment.net/62930331067.pdfIn PDF document text
    • http://kozidozilujivox.getenjoyment.net/fedex_store_jobs_san_diego.pdfIn PDF document text
    • http://rigoditibalun.mywebcommunity.org/how_to_reset_a_odometer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://vorisenunajix.myartsonline.com/8386863526.pdfIn PDF document text
    • http://nununad.myartsonline.com/valoritobilib.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/android_app_development_course_fees.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/gexav.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/lajopojuxifena.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/807297168.pdfIn PDF document text
    • http://sajulugebimisu.myartsonline.com/sikutepuwijosidazexu.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/difference_between_am_and_fm_modulation.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/24172586362.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A423 23592 bytes
SHA-256: 239f26d878f8cc663f424113d5d0bbcb0df7d14d66f30fa55f19f2cc52e37963
font_01_sfnt_off0001ed1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ED1C 5580 bytes
SHA-256: 1d516d4f0ecbc47eb18ea8236b1269f64f7eb007439d3b37d58b9bcf8981cf46
font_02_sfnt_off00020000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20000 4692 bytes
SHA-256: f2d817c5f3df753f56916a81bf2ae536253c527470e91272faea7b79f7dd787b
font_03_sfnt_off0002101c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2101C 15408 bytes
SHA-256: e5c66b8e0c4e71a379b8c4f486b29d2d802eff47db713f209b0fb16d15864165
font_04_sfnt_off00023c85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23C85 17612 bytes
SHA-256: 04ba98802915aeacd8da4b3137e306b4b3a7cf64e835b7bbf52039e6cf47ec4c

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