Malicious PDF — malware analysis report

Static analysis result for SHA-256 56074307bc40289c…

MALICIOUS

PDF

91.0 KB Created: 2021-07-05 00:43:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 2b962f3fb9cff1aeddd7ffe82c69807f SHA-1: 0c6292a6985969016356bcdbb72c2d703cee46ce SHA-256: 56074307bc40289c1b68e12ba797c35dabdd07729973bc2eb1e9bb9bbf6d2aea
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous URLs pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate an attempt to trick users into downloading further malicious payloads or visiting phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • 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://allytemp.ru/uplcv?utm_term=feature+filmmaking+at+used+car+prices+pdf PDF link annotation
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/b8e48115919945a2878f6da9f8310410/61785512265.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/febixidikazixaguxa.pdfIn PDF document text
    • https://panegovernance.com/ourprojects/chowki/UserFiles/file/15315519759.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/labotovu.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/abf0f5b607d74e4e96f6fd7b6360635a/41085972720.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/liibv7gpeoklnkgcvtcj5hrub8/tedenufi.pdfIn PDF document text
    • https://matras-matrasych96.ru/admin/ckfinder/userfiles/files/8223572341.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/zelufewagifopobamagokofup.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210507082216125.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af670e3dd11.pdfIn PDF document text
    • https://dadesigning.com/daduserfiles/files/14772748978.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a44bee810a4---juluwe.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607224600055c---gagisawuziseramuxowarosi.pdfIn PDF document text
    • https://baoyi-chuck.com/ckfinder/userfiles/files/78427729881.pdfIn PDF document text
    • http://3e-recycling.ru/app/webroot/filesfiles/wojerisu.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1607777c2ccbac---12175271531.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3eb5347c47---lamabefofokekofuw.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3a06c9f54---vukekebogudafuvedaz.pdfIn PDF document text
    • https://fenixfalt.com/userfiles/file/sijozuziriku.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/c0987bd25daa75f3d21787735b8f31aa/37215121701.pdfIn PDF document text
    • http://fernandopelosini.it/userfiles/files/57949952633.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f059a69051---tewivovoposomogobefekap.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011a0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A0E 16528 bytes
SHA-256: 18bf2974566ba7eda6238928d94019e28c2731b42297951d8b6432f477f26ecc
font_02_sfnt_off00014500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14500 11012 bytes
SHA-256: 722c9eb147db647871372610204eb63648f4e404e83049112401de95e575ac98

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