Malicious PDF — malware analysis report

Static analysis result for SHA-256 9806e1e643c2327b…

MALICIOUS

PDF

81.1 KB Created: 2021-09-18 09:05:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0cd463b8ccfae5782645a6073cfabf79 SHA-1: c28965fd7a50d2ae96c923ffda4d0678e2bbcb95 SHA-256: 9806e1e643c2327b92f0cfa72eee7b1e016a36b4f5658e9d336776b450837a0e
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The 'SE_CALLBACK_LURE' heuristic strongly suggests a callback phishing or tech-support scam, where the user is prompted to call a number. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious intent to deceive the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/713003fa70c12d0c499a36fb87e4c22d/54918300492.pdf
    • https://taucaotoccatba.vn/images/news/files/81035765922.pdf
    • http://inbeeldt.nl/userfiles/file/56007922645.pdf
    • http://ski-experience-japan.com/images/blog/file/64954741096.pdf
    • http://abcgsgeds.friendship-match.com/upload/files/xojetuledora.pdf
    • http://bong-dem-long.org/upload/editor/files/69629803890.pdf
    • https://grandhotelushba.com/userfiles/file/firawa.pdf
    • http://skogsformedling.se/bilder_umeny/File/44832929766.pdf
    • http://yogo110.com/userfiles/file/keveb.pdf
    • https://urology-andrology.com/userfiles/file/rozomuxuwefegugaf.pdf
    • http://stonestudio.pl/files/upload/file/kufarikozivoxaji.pdf
    • https://www.weldcor.ca/public/ckfinder/userfiles/files/36691489293.pdf
    • http://hometextiles-consultant.com/ckfinder/userfiles/files/wikejojokegitidirixugev.pdf
    • http://www.its-dph.cz/admin/fckeditor/editor/userfiles/file/62056268673.pdf
    • http://rebizplus.com/userfiles/file/watolasupes.pdf
    • https://nsaimmigration.com/userfiles/file/32659273868.pdf
    • https://ckmusicdesign.nl/userfiles/file/99033967402.pdf
    • https://client-sms.com/ckfinder/userfiles/files/wibeg.pdf
    • http://toitureetfacade.fr/data/Files/48683854176.pdf
    • http://mascotdd.com/file_media/file_image/file/38080173990.pdf
    • http://szilasfood.hu/pic_upload/files/japogosid.pdf
    • http://bdsductri.com/upload/files/3995593336.pdf
    • https://limpiezasinasel.com/userfiles/files/lobizetawexagukokub.pdf
    • http://trovas.com/userimages/95079378625.pdf
    • http://gotoippc.com/ckfinder/userfiles/files/69971171842.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=cash+app+ios+10+required+android
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6f5.bin
ecb6e7fac064a64a5c3c88e59f492d21a378f257845115f46009489cb4858e5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F5 10796 bytes
font_01_sfnt_off0000ef8e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8E 16792 bytes
font_02_sfnt_off000107a0.bin
b7b4735a4f879169c2b14cad7422e1a4b4c874fb85f076f4ed1936ed4cd83e09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107A0 18196 bytes

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