Malicious PDF — malware analysis report

Static analysis result for SHA-256 7048886dda60a3ef…

MALICIOUS

PDF

71.3 KB Created: 2021-09-19 04:18:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e74972868a89d1b61ccb2af29b8d8845 SHA-1: e70f59e98dee8fa6ceb22260d5d491c0389ab9d3 SHA-256: 7048886dda60a3ef0b84500806b323c8edc2899bc4670d0d8fa15ab92f5d558a
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating it is designed to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of embedded JavaScript points to T1059.007, and the overall nature of the file suggests it was delivered as a spearphishing attachment (T1566.001).

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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.
  • 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 https://oniceh.ru/uplcv?utm_term=spider+man+2002+movierulz PDF link annotation
    • http://tabouligrill.com/ckfinder/userfiles/files/97188490395.pdfIn PDF document text
    • http://charmingcurls.se/upload/file/wowulekojubimofetasojumi.pdfIn PDF document text
    • http://pwr-tech.ru/userfiles/file/xodukoz.pdfIn PDF document text
    • http://mediasingrid.com/js/new/fckeditor/userfiles/file/gufenoworug.pdfIn macro / runtime command snippet
    • http://huh.hu/UserFiles/File/23528315661.pdfIn macro / runtime command snippet
    • http://anthonyjcincottalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/16048501505.pdfIn PDF document text
    • http://gotoippc.com/ckfinder/userfiles/files/diduvoradavopuwizolomufi.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16140c2c0d18a9---komemimobepevivaligogu.pdfIn PDF document text
    • http://www.cerathai.com/image/upload/File/84486927715.pdfIn PDF document text
    • http://unionnutritech.com/upload/files/zivizajadozikogadito.pdfIn PDF document text
    • https://asiapharma.la/files/files/fetikigevakuzujeb.pdfIn PDF document text
    • http://ozcetinler.com/userfiles/file/85255088918.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/tigaliranijoxiduzudotati.pdfIn PDF document text
    • https://eccdc.org/application/webroot/userfiles/file/25332595900.pdfIn PDF document text
    • http://reelproductionshd.com/userfiles/file/40779303095.pdfIn PDF document text
    • https://banktapeunadana.com/tapeunadana/bank2/admin/userfiles/file/64811793621.pdfIn PDF document text
    • https://ikuseikyokai.jp/ckmedia/files/36824570241.pdfIn PDF document text
    • http://nbkhjc.com/uploads/202109/file/210904195740064616i6h7gd2j8xl0.pdfIn PDF document text
    • http://uzks.hr/upload/datoteke/zemuxijijakomupusebil.pdfIn PDF document text
    • http://sozopolihills.com/userfiles/file/9683003701.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/sumutufanisijakatifopulus.pdfIn PDF document text
    • http://xn--j1aai7d.xn--p1ai/userfiles/file/malomozipi.pdfIn PDF document text
    • http://dreamwith.gni.kr/ckupload/files/porutexekugunemoket.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/q02ve6acki8uma51egs0d8itlm/pubakurofitug.pdfIn PDF document text
    • https://isosklo.cz/uploads/2238348189.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_off0000b5c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5C8 10832 bytes
SHA-256: abeda068e951892ecf54e1f66ff7e5bc119b4c7e77b00374568c3971ae3e296a
font_01_sfnt_off0000cebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEBE 15716 bytes
SHA-256: 07707a22bedcb5b2a42dcb1e4784f87d55afe47d3d594687b1807061c09f9168
font_02_sfnt_off0000f771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF771 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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