Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee59f51723b460a9…

MALICIOUS

PDF

71.5 KB Created: 2021-03-02 02:29:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: f4b7b1a530d09cefbf15100f72bb5df3 SHA-1: 3cdad271af3c724502742de798508d8ad5a2c569 SHA-256: ee59f51723b460a92895993899dd168bac916db52dc1b8ff90c9c5bf77d498c1
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://baarspo.ru/award?keyword=how+to+lose+weight+exercises PDF link annotation
    • http://bitalotava.scienceontheweb.net/nevemelapopawaraxirun.pdfIn PDF document text
    • http://saxobupazes.sportsontheweb.net/93183825284.pdfIn PDF document text
    • https://cdn.sqhk.co/balemarize/wChg5ha/16968431707.pdfIn PDF document text
    • https://telixezudaridif.weebly.com/uploads/1/3/0/7/130775339/gusupefafamo-xajepurud-kulivutumarifo.pdfIn PDF document text
    • http://pimifawimonidij.mywebcommunity.org/27200863851.pdfIn PDF document text
    • http://joweponula.mywebcommunity.org/big_bang_theory_season_12_finale_full_episode.pdfIn PDF document text
    • https://dofisizowi.weebly.com/uploads/1/3/4/3/134327642/bdc741f145b.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/nevowimo/apology_email_for_sending_wrong_information.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/rirexuruzufoje.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/jexogizo.pdfIn PDF document text
    • http://tososite.onlinewebshop.net/nanajuwefidevivixebaka.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/susoden.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/66953800082.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/ropif.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/android_espresso_example_github.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_off0000db40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB40 4972 bytes
SHA-256: c174433f752b10ce3fee63723821ad962f153aec4ceabbec489b4ed0be7f04e4
font_01_sfnt_off0000ec3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3F 10828 bytes
SHA-256: b294eb63d9a9fe8803e969ce6edabc6d81f2ad0253084db102762f640f172f21