Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e2b3a412ee6e117…

MALICIOUS

PDF

80.8 KB Created: 2021-09-14 06:48:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9f32f50d330d4afbc621deb8eeb1cc23 SHA-1: fad1d6a8ff4dedbe064ba78b70be6795df2c4abe SHA-256: 1e2b3a412ee6e1177b5e635f8d14ae1caa2f796c4051ff78e90a0280ba1861db
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that contains numerous embedded URLs, many of which point to suspicious or unknown domains. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence score point towards malicious intent, likely related to directing users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://dakov.hu/_user/file/tifevudizujiwetinifiropax.pdf In PDF document text
    • https://lalicorne-hotel.com/userfiles/file/52346239330.pdfIn PDF document text
    • http://controldellaves.com/app/webroot/arxius/file/lemeviwowiguzal.pdfIn PDF document text
    • http://szintai.hu/ckfinder/userfiles/files/lulusipojefas.pdfIn PDF document text
    • https://fontaine-eva.fr/userfiles/files/sexejixiwunudido.pdfIn PDF document text
    • http://parvazyab.net/basefile/api203/files/xazeresomilukogojijaje.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613d379f5a02c---badijugiresivixorukagum.pdfIn PDF document text
    • https://avigailpekelman.com/sites/default/files/file/sevaxe.pdfIn PDF document text
    • http://esejsc.com/upload/files/71198999409.pdfIn PDF document text
    • http://tv-sat.cz/userfiles/file/wonikatuv.pdfIn PDF document text
    • https://detmers-kontejner.hr/files/47113355440.pdfIn PDF document text
    • https://tjpapigroup3.com/contents/files/kinupolutowavulozoda.pdfIn PDF document text
    • http://igs.compcierge-asia.com/ckfinder/userfiles/files/44683933084.pdfIn PDF document text
    • http://sccsfz.org/upload/2021-09/76570755994.pdfIn PDF document text
    • http://marasintl.com/public/ckfinderuploads/files/zibipawutulune.pdfIn PDF document text
    • http://debsecond.net/UserFiles/File/10365417527.pdfIn PDF document text
    • http://badischer-kunstverein.de/ckfinder/userfiles/files/83957685018.pdfIn PDF document text
    • http://blessingsngo.in/userfiles/files/botalaxavuxagofisakelolu.pdfIn PDF document text
    • https://okna-kursk.ru/page_edit/_samples/userfiles/files/86183052524.pdfIn PDF document text
    • http://richardchong.com/userfiles/files/5030114107.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613200a96e04e---loxad.pdfIn PDF document text
    • https://terrebleue.org/userfiles/file/powepad.pdfIn PDF document text
    • http://lasfyy.com/uploadfile/file/20210905095836288.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=3+finger+screenshot+settingPDF link annotation
    • 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_off0000d760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD760 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF72 17752 bytes
SHA-256: 47f54992f21a3af80be2058de707aa72b4a19c534b2634f42dacf5a35575f2ec
font_02_sfnt_off00011dce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DCE 10484 bytes
SHA-256: 7debfcbc8f14e2b6c24dc8948464f9956fe7a258b22143b829c844ef94744a53

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