Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bf982728cded15c…

MALICIOUS

PDF

99.9 KB Created: 2021-08-20 01:50:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 434f6e1c25642ea627b8635438972930 SHA-1: 568b69472f76b8f35b7f737794c5551aed6e7a7f SHA-256: 1bf982728cded15c72035e8134783f1592571ade3bb24d8a6e626eb64839bbca
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution campaign. The presence of these links indicates an attempt to redirect the user to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/85762f4491dfa8ee248e2a5b519f06f1/45992169525.pdf In PDF document text
    • http://texasstatealphaxialumnae.com/clients/f/fe/fe72632f573fdc77cca6b85875c63e8a/File/wigokatuzafuzutebal.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/66314387262.pdfIn PDF document text
    • https://teenvolunteerhouston.com/wp-content/plugins/super-forms/uploads/php/files/e2a05bf015a6b6482d008fc64e714ce0/navixajamivixafomefawuxak.pdfIn PDF document text
    • http://abc-tel.ru/data/File/linulukepadonewanidun.pdfIn PDF document text
    • http://zerosquareonline.com/file/54755656607.pdfIn PDF document text
    • http://trunglam.vn/uploads/userfiles/file/20647991015.pdfIn PDF document text
    • http://99hospitalitygroup.com/ckfinder/userfiles/files/4470509951.pdfIn PDF document text
    • https://samowar.ch/upload/file/bedufafevuxagoratumuni.pdfIn PDF document text
    • https://cafesca.org/ckfinder/userfiles/files/lodiketaremawizusofekose.pdfIn PDF document text
    • http://naturalmis.com/userfiles/file/xedub.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1611b8a5964afd---90116805827.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/391bae24c1f1131c5b0a7d129ba4f741/vikimepabubipufilul.pdfIn PDF document text
    • http://krikrik.ru/uploads/ckfinder/files/sorarurixokajarabovoli.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/12612b4498b24d1ea9b2ce389ddfb129/39977925228.pdfIn PDF document text
    • https://kaptenhoki.info/contents//files/46203200260.pdfIn PDF document text
    • http://gdlianyu.com/uploadfiles/file/xinajolu.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/mennea6jhjvgq2j4pe39p5f971/jaridiwox.pdfIn PDF document text
    • http://goopenapp.com/uploads/files/sibavitavutudapulusafa.pdfIn PDF document text
    • https://www.artikel238.nl/emmwebbit/resources/ckfinder/userfiles/files/12502188281.pdfIn PDF document text
    • https://stradatextiles.com/upload/ckfinder/files/busebuburizewenu.pdfIn PDF document text
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606d11ede4bd8---tosuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=livro+fundamentos+da+economia+3+edi%C3%A7%C3%A3o+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_off00011840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11840 21528 bytes
SHA-256: 3d0342b299b040c4d68db42869d8e465b6355abe6e5be885c0f23a0476912f4e
font_01_sfnt_off00014c28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C28 11492 bytes
SHA-256: ccf38d2bc5fac73357618537f38cd399e7b4980fec73244f5781163ce867885d
font_02_sfnt_off000166b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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