Malicious PDF — malware analysis report

Static analysis result for SHA-256 716572634d14be6e…

MALICIOUS

PDF

82.6 KB Created: 2021-09-12 16:54:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b7c5555126eb04fe12c68e9cb3974e1e SHA-1: c82800008f5a5c489e0d4960127e0056e13bab98 SHA-256: 716572634d14be6eb063595783612565123e43f9bbba85708922c2fdd5d2f11a
134 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 potentially malicious or unknown domains, suggesting it functions as a link farm or distribution point for further malicious content. The heuristic 'SE_URGENCY_LURE' suggests the document may employ deceptive tactics to prompt user interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://bharatbiodiesel.com/userfiles/file/70047557600.pdf In PDF document text
    • http://wpchkg.com/upload/image/file/30991203071.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613cf3f144a84---jenexanadikezokavobu.pdfIn PDF document text
    • https://negaratoto.com/contents/files/27816706762.pdfIn PDF document text
    • http://krukaiart.com/userfiles/files/jibulow.pdfIn PDF document text
    • https://scalper.ir/data/files/file/46124820989.pdfIn PDF document text
    • https://maharajganjtimes.com/assets/ckfinder/core/connector/php/uploads/files/4206689438.pdfIn PDF document text
    • http://yuanhebiotech.com/upload/files/nomuxiromowulewosufekegix.pdfIn PDF document text
    • https://tramtron.vn/uploads/files/files/watibevetasazero.pdfIn PDF document text
    • http://www.egavilanes.com/ckfinder/userfiles/files/7345391175.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/87327445668.pdfIn PDF document text
    • http://abcbyspu.com/ckfinder/images_store/files/96088004543.pdfIn PDF document text
    • http://rem-proekt.com/f/file/faxokimebuzimibusugiw.pdfIn PDF document text
    • http://feg.vn/uploads/files/zenunujopevuvaz.pdfIn PDF document text
    • http://katachizu.com/img/news/files/wepaxoniluvipotoxopivuvom.pdfIn PDF document text
    • https://fototipia.hu/files/files/48657700042.pdfIn PDF document text
    • https://gtijsr.com/userfiles/file/wolevit.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/e7fa4418c4b0dce3df681e8a580ac6f3/76093749659.pdfIn PDF document text
    • http://sccsfz.org/upload/2021-09/sosube.pdfIn PDF document text
    • https://onderdurdu.com/upload/ckfinder/files/lowekegoxupegewutowuseb.pdfIn PDF document text
    • http://gonvvama.net/filespath/files/20210911024755.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=pathology+books+for+mbbs+pdf+free+downloadPDF link annotation
    • https://easyown.ddproperty.com/datas/files/zomubelokaleromufow.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_off0000d853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD853 19152 bytes
SHA-256: 40b79d36dc211ba653866caa494f88f040e0eb4a5c52171bbc39208fa283e595
font_01_sfnt_off00010a8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000122a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122A5 11284 bytes
SHA-256: 072b4ae8797e4d3baa98747e9b0d2019c5e18c09f25262c3ccda0338bf6f9d98

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