Malicious PDF — malware analysis report

Static analysis result for SHA-256 996c96572cffc7bb…

MALICIOUS

PDF

335.5 KB Created: 2021-03-28 14:44:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: fa43feaac27ddab9100d3cae992468b3 SHA-1: a8424b745368a488fbc1ec9134eabefb19cf4513 SHA-256: 996c96572cffc7bb819503cb8fb67f3616c6bfa38757440bbbe0fc2ae1040e7c
136 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it's a phishing lure, specifically using an SEO redirector to disguise a free download. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing campaign designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9195

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://leonvi.ru/wix?keyword=house+on+mango+street+comprehension+questions+part+5 PDF link annotation
    • https://cdn.sqhk.co/tojofelekob/ihqhegj/filob.pdfIn PDF document text
    • http://inscarusa.info/backup_bloc_de_notas_androidrlhvs.pdfIn PDF document text
    • http://fbcopyright-center.com/electronics_all-in-one_for_dummies_free_downloadcbgul.pdfIn PDF document text
    • https://menuzuxa.weebly.com/uploads/1/3/1/0/131070619/jidebon_fobopu_benagikaniba.pdfIn PDF document text
    • http://blancop.xyz/jocko_willink_discipline_equals_freedom_field_manual_audiobookw97kx.pdfIn PDF document text
    • https://senaduwofajix.weebly.com/uploads/1/3/0/7/130775021/999863.pdfIn PDF document text
    • https://cdn.sqhk.co/nupopobax/0heih8W/31189997257.pdfIn PDF document text
    • https://jaweditulopo.weebly.com/uploads/1/3/4/3/134313576/d3860cf5411e1b.pdfIn PDF document text
    • http://getallcreditscores.info/86227467890uwzh1.pdfIn PDF document text
    • https://kawavaturitavo.weebly.com/uploads/1/3/5/3/135321378/rugodi.pdfIn PDF document text
    • https://biwusegunaji.weebly.com/uploads/1/3/4/0/134096831/bakalexafatimow.pdfIn PDF document text
    • https://cdn.sqhk.co/tiviluluje/1xgitgj/epson_moviemate_62_lcd_projector_model_h411a.pdfIn PDF document text
    • http://fb-ig-copyright.com/pinizagofuvafateshdrk.pdfIn PDF document text
    • https://voxalasodakuro.weebly.com/uploads/1/3/4/0/134042561/ridelepevevozibete.pdfIn PDF document text
    • https://dumunevebule.weebly.com/uploads/1/3/0/8/130874169/vobigujopovu.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/minaxigevani/gixasaxitujejoxememeber.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/44566478891.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/el_diario_de_greg_4_pelicula_completa_en_espaol_latino_descargar.pdfIn PDF document text
    • https://s3.amazonaws.com/futamo/join_files_linux.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/boar_hunting_guides.pdfIn PDF document text
    • https://s3.amazonaws.com/laginekux/excel_vba_copy_existing_worksheet_and_rename.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/how_much_is_hisense_table_top_fridge_in_ghana.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/98750692442.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0004d765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D765 2196 bytes
SHA-256: 3a3481e4e43a5c6992a82edfbfe257f4305e86aa57772b156a00fc320a8cd36a
font_01_sfnt_off0004e181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E181 5408 bytes
SHA-256: 39dbbbe17f52a28dea3c3c016b7e3f4f885028a6b3b3e2d27caa50865abf661e
font_02_sfnt_off0004f3b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F3B7 13524 bytes
SHA-256: f8b004407260bc4bcaa67b7a04d2be516f167485b9acbd1a88382732f444a982
font_03_sfnt_off00051fb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51FB3 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f