Malicious PDF — malware analysis report

Static analysis result for SHA-256 80719ce1364f1003…

MALICIOUS

PDF

83.9 KB Created: 2021-07-19 12:53:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: fb2943d21912c5f807cb0588432e6748 SHA-1: b6d4c2715187e321c645f5bbd560b01b8bf3dce3 SHA-256: 80719ce1364f1003de16f2507dcfdf8ed6544be5b1d950d83db397fea45a6309
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to direct users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/01890327e6ef78609b098e5495710332/sopolomajokug.pdf In PDF document text
    • https://prcomponents.com/ckfinder/userfiles/files/74732225702.pdfIn PDF document text
    • http://edu-tur.ru/userfiles/file/45375206819.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/95bc51f130be66b24f2ddab5f05af5af/72381099708.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/48826610a117f90e1035dccd5fc4f0b2/surovupilurefozixifojel.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/9c808ba71f2d20796b068cd9a8ebaac5/xavejagupumu.pdfIn PDF document text
    • http://universitecentrale.net/uploads/FCK_files/file/97841757067.pdfIn PDF document text
    • http://heibldr.hu/FCKfeltoltott/file/nibed.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1f25a16174---sawizexojariz.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087fad117b58---88440453782.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/puruwasigap.pdfIn PDF document text
    • http://dunajecbiala.pl/upload/File/vasenafawinovejuvejarawe.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160732fda1993f---70999254110.pdfIn PDF document text
    • https://ready4use.ru/uploads/files/wapefepovexago.pdfIn PDF document text
    • http://timeyear-v.com/userfiles/file/11204476188.pdfIn PDF document text
    • http://studiocinti.eu/userfiles/files/pajaziwarojilufakimodur.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/kasq41arsl4c2ta7sv84iuanl5/98692651445.pdfIn PDF document text
    • https://thediamangroup.com/_images/files/wovipawega.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a603bf1978---vomovafukakezamusaru.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/l1b76g1mm3sjb5iae2ke99rrdn/9702578027.pdfIn PDF document text
    • http://mspchicagolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/15524213542.pdfIn PDF document text
    • https://digireg.cn/upload/97943752050.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/d9bad9a6932b5488d46b9e5527728f38/babofilu.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/82188997341.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=fcps+part+1+past+papers+gynae+obs+with+answersPDF 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_off0000dfe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE6 10976 bytes
SHA-256: 471b2aa4e8f99134eb535e5c96d032d67e3adef35d0279b3dc99e9a13ff5aeaa
font_01_sfnt_off0000f943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF943 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11155 17612 bytes
SHA-256: 184c8314fce77bfdd22217628c75b209036f4459281309d74ac8f6dd05fcaf95