Malicious PDF — malware analysis report

Static analysis result for SHA-256 315b1134fd8edf17…

MALICIOUS

PDF

71.8 KB Created: 2021-03-01 02:18:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-31
MD5: e5a3ee4aebd22dba4104186fc2419371 SHA-1: bee95fc0ae912ec60fa132e83bbac25afbf2611b SHA-256: 315b1134fd8edf17e9f8cc49b0331ba08b381441d0a0abcdb2c2be12ef1c7bf1
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/award?keyword=how+to+calculate+manometer PDF link annotation
    • https://sakotitalivuvu.weebly.com/uploads/1/3/4/8/134887700/wixusutir-lodeliv-fejubofo.pdfIn PDF document text
    • http://urolog.xyz/10640180720oi9vx.pdfIn PDF document text
    • http://centerverifybadge.com/celine_dion_song_titanict010e.pdfIn PDF document text
    • http://nigma24invest.online/97444769838w0ls5.pdfIn PDF document text
    • http://namixojebeku.iblogger.org/splunk_props._conf_report_example.pdfIn PDF document text
    • https://zabosete.weebly.com/uploads/1/3/1/1/131164473/948579.pdfIn PDF document text
    • http://beautytopshop.site/the_linux_programming_interface_bookqh1eo.pdfIn PDF document text
    • http://sadovik.me/favefafijufewetokarolotuohbd.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/liluvad/vatobutuxugaju.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/adobe_flash_player_11._2_android_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/takuredepo.pdfIn PDF document text
    • http://xidozex.epizy.com/osha_1926_subpart_m_espaol.pdfIn PDF document text
    • http://rufizugo.epizy.com/cryptopia_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/zawupoze.pdfIn PDF document text
    • https://s3.amazonaws.com/pekatikisuruki/pedukaluvetozetozusek.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/pijanozilosaf.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/tamil_catholic_bible-_audio-_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/the_silver_chair_movie_release_date.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_off0000dee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE9 4820 bytes
SHA-256: e8e1ad20430aa01dbf3c7654807492876f8dfb00505549f6d522ff0842cbb405
font_01_sfnt_off0000ef43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF43 10132 bytes
SHA-256: 93f5ce4e8f9c812abe2dbd6d83fff79b8007a02bcbd52dba5509cd72ce9070de