Malicious PDF — malware analysis report

Static analysis result for SHA-256 742d7e9501f44572…

MALICIOUS

PDF

83.4 KB Created: 2021-09-20 03:54:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3741661bf4e1af6be997814797bcd061 SHA-1: c97625f5af007487166f1a82716407e207270281 SHA-256: 742d7e9501f445723d92929234c3650c2311eadf3de813c713619062b2dd18e8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to suspicious domains and are structured as a link farm, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior, suggesting the document's primary purpose is to redirect users to potentially harmful sites.

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 https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/d5a6677b98da56ab37f4b21109d0009b/93969973878.pdf In PDF document text
    • http://esrafisek.com/images_upload/files/32456637818.pdfIn PDF document text
    • http://cinstech-inspect-survey.com/fckeditor_userfiles/file/12041616507.pdfIn PDF document text
    • http://askort.pl/Upload/file/mejoxu.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613027d1154d6---58165563543.pdfIn PDF document text
    • http://lineshare.net/upload/files/20210919122604.pdfIn PDF document text
    • http://carlaschroyen.com/content_docs/97935606917.pdfIn PDF document text
    • http://gardenofsound.com/userfiles/files/63072063056.pdfIn PDF document text
    • http://ambvetesopo.eu/userfiles/files/jitodidovofimivonasomegod.pdfIn PDF document text
    • https://adtw1.com/ckfinder/userfiles/files/54347906793.pdfIn PDF document text
    • https://xn--fct8ml6mwue.tw/uploads/files/zasujupedugidolabebifa.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210903_6D2AB40452C0C21D.pdfIn PDF document text
    • http://gongotour.com/FileData/ckfinder/files/20210907_05045928FE05E054.pdfIn PDF document text
    • http://austral-immo.com/userfiles/files/jitataxopaxupetakogabi.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/gusamebavup.pdfIn PDF document text
    • http://terralis.eu/catalogue_dynamique/file/xoleneroxidebopenagizuxow.pdfIn PDF document text
    • http://simpelms.nl/userfiles/files/kexube.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/99983504820.pdfIn PDF document text
    • http://3bbb.fr/ckeditor/upload/files/12082867557.pdfIn PDF document text
    • http://golfproradost.cz/webpagebuilder/ckfinder/userfiles/files/marubarotodizugoriv.pdfIn PDF document text
    • https://www.bnbtravels.com/ckfinder/userfiles/files/kovujolere.pdfIn PDF document text
    • http://dfwarbitrator.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zogotonepasox.pdfIn PDF document text
    • http://eastcity.hu/ufiles/file/33718330097.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=android+ereader+appPDF 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_off0000e46f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE46F 17340 bytes
SHA-256: 365ffc00f7e94617c66b231d74d541dee60035b2556036c5037197bedba12990
font_01_sfnt_off0001117d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1117D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12994 10052 bytes
SHA-256: 87a3cd06ce6a6d6ba51830157dce00f76fad0afad1092af2ff725477238cbd80

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