Malicious PDF — malware analysis report

Static analysis result for SHA-256 5617a563ee18d054…

MALICIOUS

PDF

89.2 KB Created: 2021-07-20 12:12:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 615620eb5204dd1c8d00cbe6ef73fab4 SHA-1: dd1417ced1881487fc4870485cb299d804016677 SHA-256: 5617a563ee18d05433588f754f8421d85dc1dfbe255bee02a78026f30ca903e6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating it likely serves as a phishing lure. The document contains numerous links pointing to compromised WordPress upload directories, suggesting an attempt to host and distribute further malicious content. The presence of external URI links, particularly those associated with payment or gift letter templates, reinforces the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1609675c6d7cbb---22888583631.pdf In PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/82okepu2cjab3d31hb4dk5tdqn/pepabawegubinadobex.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c62b8d8033a---11024546220.pdfIn PDF document text
    • https://www.axelendinggroup.com/wp-content/plugins/super-forms/uploads/php/files/ed1236ec0bb859e7b8c0e37551c0c189/tezixegexozukebiburas.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/12bc13b08583dc7f3d546e103c609945/letalotu.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/4905268d88a4ca0bc0ffc354fbcef11a/54938305636.pdfIn PDF document text
    • https://examonline.org/examonline/userfiles/file/78768522410.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/jogenuvuwegepaxawetu.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/16078b6ece2c6c---36753078753.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/f32f60ff75cb1924d0e9851cb0a065f6/nuworuzedud.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075958b9afe1---wosekebezerow.pdfIn PDF document text
    • https://www.propertyadvisersaustralia.com/wp-content/plugins/super-forms/uploads/php/files/2b2755af36ceebd9a600e921ed1856aa/mozakasekemunu.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160dc998f06d67---33193759040.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c414c312e8d---gikonusasubosokekefaf.pdfIn PDF document text
    • https://partner-support.net/user_data/userfiles/files/xososefekone.pdfIn PDF document text
    • https://etre-cheval.fr/Applications/MAMP/htdocs/etre%20cheval/news_pix/file/91835971786.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/l56bqjril65g8h40a93kce19mt/nusefojapipomisami.pdfIn PDF document text
    • http://hnc2.com/userfiles/file/fisuwegok.pdfIn PDF document text
    • http://studionegrelli.it/userfiles/files/47467416136.pdfIn PDF document text
    • https://aplusadvance.com/naver_editor/data/file/21658743426.pdfIn PDF document text
    • https://schilderlesvakantie.nl/ckfinder/userfiles/files/14490009986.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/fugemufebifetasudevosoxaz.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160751ca3569c5---60940567259.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/1445840e180317e992b99c47333048e2/37743821314.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/8ed148eb00bb3c80e8d1eab0082da5fc/firizowodegemusagimavuvod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=gift+letter+down+payment+templatePDF 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_off0000f84c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF84C 17212 bytes
SHA-256: 0e36e324aa51cfff6e9ab9786e7aeda4d8fc78331cb64d2b991d5b8ddfd312a3
font_01_sfnt_off00012532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12532 10728 bytes
SHA-256: d7529dba8f8747ac087b9cddf4d8970a4964ee6dd798365b8c0215cd0b2b1125
font_02_sfnt_off00013de4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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