Malicious PDF — malware analysis report

Static analysis result for SHA-256 beebeac6a8a92cb3…

MALICIOUS

PDF

87.0 KB Created: 2021-10-10 18:56:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 6d9bbd5222d638da2c6cf8ff40509094 SHA-1: 8002df2a95568a98598c4f2efb5b9c025b25de88 SHA-256: beebeac6a8a92cb31032e063533e9c88738fcb891008be85b8db4b275f8652d3
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to lead users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. The presence of multiple external URI heuristics further supports the attack pattern of directing users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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 http://eko-inwest.eu/upload/file/5477835405.pdf In PDF document text
    • http://okfilm.kr/userData/board/file/63701839700.pdfIn PDF document text
    • http://chaitraglaze.com/uploads/laxuvurorudujorukikefeva.pdfIn PDF document text
    • http://mcenterdk.ru/fck_editor_files/files/vuzumojutenopidorage.pdfIn PDF document text
    • http://greenmodels.ru/uploads/files/81290321946.pdfIn PDF document text
    • http://yangs-ns.com/ckfinder/userfiles/files/20210902035021.pdfIn PDF document text
    • http://abwferrellpkwy.com/uploads/files/85050342142.pdfIn PDF document text
    • https://virtrade.gr/userfiles_lybo/file/kirilufigapovedipotegitun.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/930706156145e3fe1ff79.pdfIn PDF document text
    • http://americasbestwingsbeltsville.com/uploads/files/fopoki.pdfIn PDF document text
    • http://xn--80aer5aza.xn--19-kmcm3c.xn--p1ai/ckfinder/userfiles/files/vimutefujo.pdfIn PDF document text
    • http://youil.org/userData/board/file/16038945152.pdfIn PDF document text
    • http://4darchitecture.org/img/all/japuremoxaluvo.pdfIn PDF document text
    • http://mazraeir.com/images/upload/files/54679315002.pdfIn PDF document text
    • https://homestayhoian.vn/uploads/image/files/29931454212.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130269215a62---vigosawupuvep.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/2709e5897956e0665b07690bf68459c7/49963239976.pdfIn PDF document text
    • http://synergytaekwondo.com/click2buy_newp/userfiles/file/72606373756.pdfIn PDF document text
    • https://mimpiindah88.com/contents/files/91046892156.pdfIn PDF document text
    • https://beeshark.ro/app/webroot/files/userfiles/files/lurixakaxefogajogazefo.pdfIn PDF document text
    • http://technestudio.eu/userfiles/files/64876594118.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/0od0s7plho6u9km5ub3skvigvd/7859401432.pdfIn PDF document text
    • http://jarauwerdaenzn.nl/userfiles/file/9876575317.pdfIn PDF document text
    • http://kunbot.com/upload/files/75750382410.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=horse+galloping+soundPDF link annotation
    • https://mediaget.com/userfiles/files/zekanijosun.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_off0000e8ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EE 10560 bytes
SHA-256: 22bd3235f27d0d8713132e59adedd35aac625ae67a049c14749d683c62493355
font_01_sfnt_off000100d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000118e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118E2 20776 bytes
SHA-256: bb5ae7178e58af6c1a96abdacaafa6682564ce99aeedc168be092565c604114e