Malicious PDF — malware analysis report

Static analysis result for SHA-256 e942ff3c6c4edfa1…

MALICIOUS

PDF

80.8 KB Created: 2021-09-17 15:05:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ff776fa44f205eedc20afb9828c4c5aa SHA-1: 1723cd5f62ac8ba2c71490218062bf8e6b3bbd0a SHA-256: e942ff3c6c4edfa18b85658e52aec8acef15cd3d189cbcec55a5782d9751e6bc
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous embedded URLs and a heuristic indicating a 'link farm' suggests a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and heuristics point towards malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://rockyhotelsgroup.com/uploaded/files/88496759249.pdf In PDF document text
    • http://hitecds.com/userfiles/file/17273792793.pdfIn PDF document text
    • http://pumarecovery.com/userfiles/files/vibizusutatuluzexor.pdfIn PDF document text
    • https://stoneappeal.in/FCKeditor/file/lafunagi.pdfIn PDF document text
    • https://www.creativetalentnetwork.com/ckfinder/userfiles/files/lijegejetiseru.pdfIn PDF document text
    • http://jaluzipro.ru/public/userfiles/file/94859178855.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/28069375673.pdfIn PDF document text
    • http://e-sportis.com/images/upload/lowadiroj.pdfIn PDF document text
    • https://gulamanis.com/contents/files/dulibenukujow.pdfIn PDF document text
    • http://f1-rennsimulatoren.de/userfiles/file/natujetutadujurumozitakaj.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/ktr0mt2u1tlghrm55hvahif91v/gobutiwadarujosij.pdfIn PDF document text
    • https://www.xyoaa.org/sites/default/files/files/xaxubizakujaveveke.pdfIn PDF document text
    • http://namjapizza.com/app/webroot/files/98575119.pdfIn PDF document text
    • http://emons-verlag.net/testarea/cwsCMSlight/media/files/gekejidogixanotolejole.pdfIn PDF document text
    • http://househouse.it/userfiles/files/gedukolawe.pdfIn PDF document text
    • http://jiehuist.com/userfiles/files/somababofumuvirosaneb.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132c17327be8---41005473644.pdfIn PDF document text
    • http://xn--9i1b14l32gg2dsybq3b.com/upload/fckeditor/file/26559333715.pdfIn PDF document text
    • http://jcon-aps.dk/userfiles/file/saresowalu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=best+mail+client+for+androidPDF 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_off0000d84f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD84F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF066 10692 bytes
SHA-256: e0f0a6697365b1eadd214307fd96a792b9ff97bcc207d1eb6f9db71cb53fab03
font_02_sfnt_off000108e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E8 17588 bytes
SHA-256: 2b5daa6a58b4a2aa6467beea5255ba16074e546274c4e6f049552bd40a29c71b

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