Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f79a757c081692f…

MALICIOUS

PDF

76.8 KB Created: 2021-09-09 23:37:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c4419bb91eb6e889722d239ae2108775 SHA-1: 2b81c6e5332a956013b4492e7c2a090a0dd0703f SHA-256: 7f79a757c081692fb77ccfbb91a7c1bd99db040780c7a0029586bbd266a627be
134 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect the user to malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or download of further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://drafthe.ru/uplcv?utm_term=power+rangers+jungle+fury+online+free PDF link annotation
    • http://www.prodomasa.com/ckfinder/userfiles/files/jizavaza.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/dazode.pdfIn PDF document text
    • http://sibleyestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/22696251932.pdfIn PDF document text
    • http://rapabzenec.cz/obrazky/files/69265336857.pdfIn PDF document text
    • https://thaiahpa.com/flash/files/wakesutawufumozorarisa.pdfIn PDF document text
    • http://chandigarhdatarecovery.com/files/file/96052441541.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f0bb0ce938---93322945471.pdfIn PDF document text
    • https://aykutemlak.com/upload/ckfinder/files/zudevasudubugere.pdfIn PDF document text
    • https://wisserarm.nl/app/webroot/files/userfiles/files/weruvimon.pdfIn PDF document text
    • http://windowsplusllc.com/ckfinder/userfiles/files/61394618405.pdfIn PDF document text
    • http://reginahajo.hu/_user/file/vesodijazadinavibajoziro.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/kmktsplho1in2ka2m8vc9tep9a/lanogovapoladowupatuzege.pdfIn PDF document text
    • http://agppi99.pretty-match.com/upload/files/99491308984.pdfIn PDF document text
    • http://interfacetravels.com/app/webroot/js/ckfinder/userfiles/files/57414789054.pdfIn PDF document text
    • https://www.solucionaesp.com/ckfinder/userfiles/files/sotelenumazegipaxase.pdfIn PDF document text
    • https://supermovi.com/userfiles/files/karepitop.pdfIn PDF document text
    • https://nepalmicrofinancesummit.org/userfiles/files/nidemoxagejebokororeni.pdfIn PDF document text
    • https://maintogelonline.bet/contents/files/62255353135.pdfIn PDF document text
    • http://gzhangqin.com/uploadfile/files/70313164244.pdfIn PDF document text
    • http://bdpq.hungminhits.com/files/uploaded/files/zomawonesetovuwir.pdfIn PDF document text
    • http://mikol-styl.cz/userfiles/file/1470832071.pdfIn PDF document text
    • http://abwingsva.com/uploads/files/17396637286.pdfIn PDF document text
    • http://jevades.com/aircraft/fckimages/file/18484601741.pdfIn PDF document text
    • http://bsa-billiard.by/images_from_html_editor/file/gebetijopuxepuzufupa.pdfIn PDF document text
    • http://jenan.com/ckfinder/userfiles/files/82623344127.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bdf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDF6 10720 bytes
SHA-256: 0b979620c6b9e8182ab609e3bad6090c3faef34c3d9d63a8d1d0aa082c20b69b
font_01_sfnt_off0000d6bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6BB 17352 bytes
SHA-256: 2dca1f88909f03f0f6255181064730ca4b9401ca939fa9b57c12b46a3dd63287
font_02_sfnt_off000103b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00011bbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BBD 2044 bytes
SHA-256: 97a693020a9c67c913fa5abf5d83a61848c846aa130c5182d8e66f233602b60d