Malicious PDF — malware analysis report

Static analysis result for SHA-256 58e08f2c8ac8ee41…

MALICIOUS

PDF

92.9 KB Created: 2021-09-04 12:58:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8f3e55d3202b94525ee5c88115a4187b SHA-1: 919e28532d0829d8edfd3b10f11761bd077fb7c0 SHA-256: 58e08f2c8ac8ee410c1a21f5c4b34ab8799dcf8cd7d4fdd1cdf6347de56544f5
196 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous links to compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of 'LOLBin token sequence in document text' suggests the PDF may attempt to execute commands or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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
  • 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.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cengilli.com/icerik_images/file/lakoxazanutegivotisukuziv.pdf In PDF document text
    • http://apluskleaning.com/admin/images/file/lofositofulukibupi.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/021f49f2fe54270a35bafeec6745d36d/59147673800.pdfIn PDF document text
    • https://campermagazine.tv/public/file/xifolosenimerapawikobosoz.pdfIn PDF document text
    • http://impex-italia.it/userfiles/files/66252492143.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/f39s425jf5hbsbd6l5mfc151bo/25031421674.pdfIn PDF document text
    • http://uralinteh.com/uploads/files/xipunilorotafosofuje.pdfIn PDF document text
    • https://movie2book.com/userfiles/file/zodudefijawufapovefo.pdfIn PDF document text
    • https://biserica-izvorul-tamaduirii.ro/files/saduloxasevewujajawo.pdfIn PDF document text
    • http://saigondome.com/uploads/userfiles/file/menolabogezatosun.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160daee965f49b---95471782581.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/3cf655e996645df24996578a0c012e9b/16616408392.pdfIn PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/91813189527.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8f2292fd6c---16345866924.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612e62fd140da---88206484887.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16094c06f671aa---16606778998.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/66e1bf79dddab50a1039f4c1956222f4/35105809660.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/a10647dd7aba93b6bf0aa7abb26e51dc/xafiwumakeveluve.pdfIn PDF document text
    • http://charmingcurls.se/upload/file/94631157817.pdfIn PDF document text
    • http://tungalag.mn/userfiles/files/xizilukugatana.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/kdfpgihi5eemft06k1aa0hejrt/jasojujejivezi.pdfIn macro / runtime command snippet
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/9vdqjld6th1g7e03ld4tuerpr5/31943590234.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16090bfeb0fd8f---1240227688.pdfIn PDF document text
    • https://roomart.uz/ckfinder/userfiles/files/patosivod.pdfIn PDF document text
    • http://tungalag.mn/userIn macro / runtime command snippet
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=philippe+rushton+pdfPDF 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_off00010678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10678 18480 bytes
SHA-256: 77659e04d08e9b1f94650b89a8f400e75c875a57bda28022a3add7aa934d6188
font_01_sfnt_off00013657.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13657 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014e6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E6E 10536 bytes
SHA-256: deda3457a20b092000ce871526fbc446b80094ca1453fdc603c816c7360a99ba