Malicious PDF — malware analysis report

Static analysis result for SHA-256 8868ac6e846e2ff9…

MALICIOUS

PDF

85.1 KB Created: 2021-09-04 05:47:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9943a37949b526695fbfa7de72fe9f44 SHA-1: 41f0e3a7817a0f1ad02ed2d84af8abd38c7ea2ec SHA-256: 8868ac6e846e2ff97a160b458a9dfdd1dace1ecbebbab45d54bc568f34f5a743
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to multiple compromised WordPress sites, likely intended to lure users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. No scripts were extracted, but the structure and URL findings are sufficient to determine the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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
  • 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://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a09498e0c8---70073282930.pdf In PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c1037fca83d---1286283340.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ab5dad09d6c---56082343584.pdfIn PDF document text
    • http://www.examnotice.in/uploads/files/78072013870.pdfIn PDF document text
    • http://cancercareresearch.com/userfiles/file/76194940320.pdfIn PDF document text
    • http://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lulanozuzavukediv.pdfIn PDF document text
    • http://bayernglobal.de/userVZ//file/bikatexuwabululikunelewab.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/81ae405c73be09823a7203cddcf1b7fa/72617879606.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/xebejijozepenaviwapo.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/domosanosijurefer.pdfIn PDF document text
    • https://strechybenesov.cz/content/4898868927.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160757709d439a---mazanelinozowazux.pdfIn PDF document text
    • http://vizesblokk.hu/files/file/nutipupasisitin.pdfIn PDF document text
    • http://lorofilmes.com/Uploads/ckfinder/userfiles/files/pepalobidisuwikesukoweji.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/88703470443.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/ff66600e3gui65paemgu2d2960/mujinesatoti.pdfIn PDF document text
    • http://duancanhotot.com/upload/files/45847664176.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/userfiles/file/17878451280.pdfIn PDF document text
    • http://sutphinsgermanshepherds.com/clients/21958/File/69999517906.pdfIn PDF document text
    • http://calliopegoodrich.com/clients/73417/File/sutidelefotedaniku.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160c4da924a044---13037823601.pdfIn PDF document text
    • http://studionegro.net/userfiles/files/42977785668.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba5718164a---77659776112.pdfIn PDF document text
    • http://www.grifin.sk/files/91287447973.pdfIn PDF document text
    • http://andersonlawdecorah.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/72251187113.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609965ba3ada1---wepurubasoganaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=compr%C3%A9hension+%C3%A9crite+anglais+b2+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_off0000e2d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D8 11512 bytes
SHA-256: 4e705a4ccbd0b42b3ec01777a8cf68ca5b625a8f47651d8787ee28fb17da202a
font_01_sfnt_off0000fd3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3B 19056 bytes
SHA-256: 7dfbb8f009d21de4f9829f19e981ce3fbfd26c161b67afe400dca080b1e2867a
font_02_sfnt_off00012c8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C8B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.