Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6460f72c09fe21f…

MALICIOUS

PDF

82.9 KB Created: 2021-09-10 05:34:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2587e18758be2a8bd6d65601546b42e3 SHA-1: 19edd76ed904892f339e1195d5f9d65f7fae32bd SHA-256: b6460f72c09fe21f2d1e1ce108fc526623d342265db5e760135e6b62b6a0cdb2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of phishing and potential trojan activity. The 'SE_CALLBACK_LURE' heuristic indicates the document likely contains a phone number intended to trick the user into calling for fake support or to resolve a fabricated issue. Embedded JavaScript streams were also detected, suggesting the potential for further malicious actions, such as exploiting vulnerabilities or downloading additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://banghetretruc.com/media/ftp/file/12641337125.pdf In PDF document text
    • https://campermagazine.tv/public/file/nisemanila.pdfIn PDF document text
    • http://npk-bypassdrr2.com/file_media/file_image/file/2636559373.pdfIn PDF document text
    • http://cdn.eagle.mn/uploads/userfiles/files/52090315854.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613190a02a5ba---wejapuzona.pdfIn PDF document text
    • http://custom-mugs-factory.com/uploadfile/files/97808599935.pdfIn PDF document text
    • http://thanhtindesign.vn/uploads/image/files/82709534989.pdfIn PDF document text
    • https://balbok.net/admin/ckfinder/userfiles/files/tetetugarudumitowewu.pdfIn PDF document text
    • https://eclearusa.com/images/file/33252335636.pdfIn PDF document text
    • https://dazhonghua1688.com/ckfinder/userfiles/files/11885665268.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210901121240960257070.pdfIn PDF document text
    • http://www.biosafety.biz/ckfinder/userfiles/files/dejesojewoweg.pdfIn PDF document text
    • https://okinawa4d.com/contents/files/doropesamomukosu.pdfIn PDF document text
    • https://lanegarrett.net/userfiles/file/batosu.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/42337400452.pdfIn PDF document text
    • http://nj-rshb.com/v15/Upload/file/202197138442140.pdfIn PDF document text
    • http://execdentalclinic.com/uploads/ckfinder/userfiles/files/zalavaxaw.pdfIn PDF document text
    • http://studiolegaletrotta.eu/userfiles/files/xetomaketuxowuwen.pdfIn PDF document text
    • https://sfasg.jp/js/ckfinder/userfiles/files/geganimedufamadotugijaxut.pdfIn PDF document text
    • https://elitstroycraft.ru/source/file/20390824975.pdfIn PDF document text
    • https://oncallanatomist.org/ckfinder/userfiles/files/wiminonidofigotumedek.pdfIn PDF document text
    • https://odlingfamily.com/userfiles/file/542628728.pdfIn PDF document text
    • http://www.physedu.in/newsite/userfiles/files/tasivinowusoraresal.pdfIn PDF document text
    • https://winpoasia.com/ckfinder/userfiles/files/16124635646.pdfIn PDF document text
    • http://abarappresentanze.it/userfiles/files/buzopogimamunenugidem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+get+more+passes+on+episodePDF 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_off0000de54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE54 10768 bytes
SHA-256: 114e48216fd484c3d2ee5d140d119ac82cb07097d5f830903f34a5ea925fd3b6
font_01_sfnt_off0000f6e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E4 17796 bytes
SHA-256: eaf48536d80aa16974e3b19408bc1b00df8617a40e2e9133d70196b14ba9cbfd
font_02_sfnt_off0001257f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1257F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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