Malicious PDF — malware analysis report

Static analysis result for SHA-256 277dd50518a29e67…

MALICIOUS

PDF

90.7 KB Created: 2021-07-26 20:18:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7b2b9c2141999101f6625f9e979fdc91 SHA-1: 32d606d438ef917a2e82f0557b786f9ab559d152 SHA-256: 277dd50518a29e67021c3542990980019f0580b740f6b15f62feb6c0dff04396
204 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is a payment redirection lure, likely designed to trick users into changing payment details. Several embedded URLs point to compromised WordPress sites, suggesting a phishing campaign. The ML classifier strongly flagged this PDF as malicious, and ClamAV detected it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085567cad797---segijejababodefu.pdf In PDF document text
    • https://megatekspb.ru/sites/default/files/uploads/4871890092.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/e233b6e699cc79e42b786463ca191069/likisazejujovesutag.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/6vfisr5ssbh4g73qvjq0e1ikh0/ligunusis.pdfIn PDF document text
    • http://mg001.cn/upload_fck/file/2021-7-23/20210723192243624342.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/92451454120.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160792d899c750---xoparosuga.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bc1712b9569---boribodinigawerupogurezuk.pdfIn PDF document text
    • http://montagnobozzone.it/userfiles/files/50164692561.pdfIn PDF document text
    • http://bigband-ulm.de/userfiles/files/tabazotixo.pdfIn PDF document text
    • http://www.vljainandco.com/userfiles/files/navewoxerurapofabaduji.pdfIn PDF document text
    • https://burgaseguros.com/userfiles/file/xujofox.pdfIn PDF document text
    • http://zit-tech.com/userfiles/files/14539534004.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a792ab58d87---71196531970.pdfIn PDF document text
    • http://sgadsahodayatarntaran.org/sahodyatarntarannew/userfiles/file/xelutofamozigakofabizak.pdfIn PDF document text
    • https://travelstore.tn/userfiles/file/60329329499.pdfIn PDF document text
    • https://conexus-study-abroad-travel.com/ckfinder/userfiles/file/tubativudekawilegos.pdfIn PDF document text
    • http://okwmd.com/upload/fckeditor/file/kepadezomujisopuferul.pdfIn PDF document text
    • http://fotossc.pl/_files/file/33399888820.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1607a13dfe597b---ponufifokafusobunuk.pdfIn PDF document text
    • http://solar-makernavi.com/ckfinder/userfiles/files/84281125491.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/207b5d5ed69697b7311fcc4815bfa2c1/laresa.pdfIn PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/tokorejaleludolixite.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=how+to+check+ppf+account+maturity+date+in+sbiPDF 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_off0000fe42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE42 11364 bytes
SHA-256: a08451d9b44f45d27f448cab68b329197487509176fae027d19ca3d784a42993
font_01_sfnt_off000118a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118A8 16708 bytes
SHA-256: 16764ac5302abcd9aad7d2bff8fbc8dd1996f8b7d9abc48c63e77f6b8bd83633
font_02_sfnt_off00014418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14418 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1