Malicious PDF — malware analysis report

Static analysis result for SHA-256 799cd1e86ea91e82…

MALICIOUS

PDF

70.8 KB Created: 2021-02-11 14:42:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 86f53fc2fb971a6d72ef8ca7342f8a27 SHA-1: 40fc65a8e22319f9a322b5daf8af43f6474226e7 SHA-256: 799cd1e86ea91e82a5890cf83c4da76a6c2eb16ba80a384ef8548da44f2f7aed
144 Risk Score

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://druttle.ru/wix?keyword=samsung+j2+theme+store+apk+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378175/normal_6015c54037c9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421464/normal_6018361db3145.pdfIn PDF document text
    • https://cdn.sqhk.co/zaviresodew/ehmHiiL/taotao_4fun_150cc_go_kart_parts.pdfIn PDF document text
    • https://cdn.sqhk.co/mitugejaxel/bsqTpii/negin_farsad_age.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417528/normal_60202754850d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368984/normal_5fe4bec4239f9.pdfIn PDF document text
    • https://cdn.sqhk.co/goronikel/ibhi4jd/zuxozuzivatis.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/jaloto/madoginodevanifuwibu.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/45132389058.pdfIn PDF document text
    • http://pejefovad.epizy.com/puromiselujo.pdfIn PDF document text
    • https://s3.amazonaws.com/jupoti/vetivokaw.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/60272219171.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/aisi_hai_tanhai_video_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/rs3_beastmaster_durzag_guide.pdfIn PDF document text
    • http://bimumebuzof.epizy.com/10359995060.pdfIn PDF document text
    • http://gasigigi.rf.gd/brazil_economic_history.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_off0000d882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD882 5840 bytes
SHA-256: 8b3b488003df9a291ac3713b793f9b999f524c14f636226d8da583323ac1a7de
font_01_sfnt_off0000ec50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC50 10000 bytes
SHA-256: 6081bc31cdccf2829552bbc83b8e0b42ba109855cb97dd3a2af96239ae37b99b