Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e479d03a0836e9b…

MALICIOUS

PDF

113.9 KB Created: 2021-07-08 04:47:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 246784fd11246d5a27bcd17998a8c908 SHA-1: d0ae26d37bcf08750afb3fa9bf3ca9f8c25679bf SHA-256: 7e479d03a0836e9b271f5cbe9d686f2f3cf24ee5dd1ffd75bee50bf3145d860c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan distribution attempt. The document contains numerous links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to exploit vulnerabilities or lead users to further malicious stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://jun-travel.com/userfiles/file/1602033705.pdf In PDF document text
    • http://quickvideo.nl/userfiles/file/4202317296.pdfIn PDF document text
    • http://ezibra.pl/upload//file/84580423095.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bc28ff0b262---94915073633.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/6ca24cbe30e44aaf3e2be4650943e6ee/sikuvesuvajuxed.pdfIn PDF document text
    • https://kudamatsu.org/userfiles/file/13818682211.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c444f8931d---movinefodafenasaxexe.pdfIn PDF document text
    • http://hpworld.hu/data/pic/Image/file/36981173693.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607081f686ecd---tumovimo.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098e59bc5be0---tovujazimefesutejekarek.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/311a119ea05f07a03991f86f8d685c5e/66844989634.pdfIn PDF document text
    • http://globaltruthmediagroup.com/clients/a/aa/aa8380eac451876ae6ab993bf3a720d6/File/tegedejuwukubowu.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/d9359a01089b2b9c3935ec2fedbd2659/rilezalizijinenapuvafipo.pdfIn PDF document text
    • https://tranhtreo.com/images/ckeditor/files/seposelusitabinomoxen.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160760e8b53a8e---xatalomawukuninurul.pdfIn PDF document text
    • http://podlahypilat.cz/admin/file/59735806307.pdfIn PDF document text
    • https://flexrocksrollovers.com/wp-content/plugins/super-forms/uploads/php/files/cje4l34taorpmu21jqbluhn7ko/maxowasijuz.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/73671973665.pdfIn PDF document text
    • https://cursosgratuitosonline.es/wp-content/plugins/super-forms/uploads/php/files/jd54g21ivdmd8nvi0ev1025mkq/42194984498.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/7210d1c513e9361d03d63bfb14ceb549/wanonidibomabesolowejusup.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/94158237149.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609de01dae7d5---86604605533.pdfIn PDF document text
    • http://efuegypt.org/userfiles/file/disogojebememovu.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/45424348876.pdfIn PDF document text
    • https://debcopharma.com/userfiles/file/tilas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=solange+beyonce+sisterPDF 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_off00015947.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15947 10736 bytes
SHA-256: c8890bb0bc851242ef958b35cd210bd2590d8f7bf560e166c3923f4f73e9392a
font_01_sfnt_off0001721a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1721A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00018a2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A2C 18612 bytes
SHA-256: 6ad9a690a3c9b2b1b43227a4e491677cf0b13e7c17b31998ccc97c5ed62bd2b9

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