Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e5e8d4fdc727a34…

MALICIOUS

PDF

85.2 KB Created: 2021-09-16 23:09:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c6f337205b884278b87be9684a75d2ac SHA-1: 9d2567c977ea240532a3b9671f1aa345bd41caac SHA-256: 1e5e8d4fdc727a3498b29ad4f20aab7f1b1fcfbd0fc14b131618947a570fa3ff
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high number of embedded links pointing to various domains, many of which appear to be disposable or used for hosting files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the sheer volume of external links suggests a coordinated effort to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • 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://huntic.ru/uplcv?utm_term=pingo+chat+with+parents PDF link annotation
    • https://dp-engineers.com/admin/userfiles/file/nifuko.pdfIn PDF document text
    • https://adium.ru/userfiles/file/luxokesowujinilamuki.pdfIn PDF document text
    • https://mavachhaiphong.com/upload/files/84632843602.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/adb483469c55241be1a9f26d533fdd59/wililono.pdfIn PDF document text
    • http://dongamold.com/fckeditor/upload_files/file/nakujopedunidepuwizugar.pdfIn PDF document text
    • http://myepres.com/HotelEstimator/userfiles/file/kefununefitebu.pdfIn PDF document text
    • http://cityfate.com/files/files/lakevomolufitixa.pdfIn PDF document text
    • https://thehideawayresortpattaya.com/userfiles/files/78122517493.pdfIn PDF document text
    • http://sarkanyhajo.hu/files/file/34439428717.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/77992210338.pdfIn PDF document text
    • https://homeuu.biz/upload/ckeditor/pages/files/pemirotewebag.pdfIn PDF document text
    • http://griesvoegwerken.nl/UserFiles/file/janurexuvefezotemapo.pdfIn PDF document text
    • http://lawyermo.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/27819696882.pdfIn PDF document text
    • http://oumkua.com/userfiles/file/tesegonafugokakuvekivivog.pdfIn PDF document text
    • https://psiakocky-potisk.cz/webpagebuilder/ckfinder/userfiles/files/galuzegewemotusiwus.pdfIn PDF document text
    • http://writtenmail.com/upload_images/file/74157638868.pdfIn PDF document text
    • http://www.og2c.com/images/file/56612886297.pdfIn PDF document text
    • http://lifecontinues.ru/images/files/domet.pdfIn PDF document text
    • http://md-servicios.com/userfiles/file/nelasozilekexagojulit.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1612f3edc989ed---98317996299.pdfIn PDF document text
    • http://colorfusion.us/admin/images/file/vamavikusot.pdfIn PDF document text
    • http://kroonzuivel.nl/ckfinder/userfiles/files/leziromojunadirugoxow.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_off0000dda9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BB 22236 bytes
SHA-256: 8edfad1605c4e8f68296f35ba767bf970ee88fcc2fbb6bb0306cc123443cff50
font_02_sfnt_off00012ea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA1 10696 bytes
SHA-256: 268f49fefdf8c14673e8df470fb399ac973adcb7c8c5c4df4eebaad375ad5b08

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