Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec98e9e4e30a8426…

MALICIOUS

PDF

86.6 KB Created: 2021-09-11 06:49:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5bd2eb075e68c32191fb531235ebe585 SHA-1: 5a480c45b1400aa6110b68b5c4124c19774e9f79 SHA-256: ec98e9e4e30a8426a5efdfc5bf7bf730938565d1ed222d13743723362f01fc2b
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document contains numerous links to external sites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to redirect users. The presence of an MFA lure heuristic indicates the document's intent is to harvest credentials or session tokens by tricking the user into approving a one-time code or authentication request.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://arcenevents.nl/site/upload/files/3986862997.pdf In PDF document text
    • http://magic-mugs-factory.com/uploadfile/files/98236651197.pdfIn PDF document text
    • http://www.sictombbi.fr/ckfinder/userfiles/files/92529342756.pdfIn PDF document text
    • https://wotfiles.com/ckfinder/userfiles/files/miwikugikamezob.pdfIn PDF document text
    • http://tikatalog.sk/_files/file/terivowinulunesuvaxokes.pdfIn PDF document text
    • http://bananamusic.tw/uploads/files/202109092252575089.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1612f28b8ef767---53602358521.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16137e2af87969---bikukamuxukigokinuriverob.pdfIn PDF document text
    • http://suvagcentr.ru/userfiles/files/82416281816.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a492255dc1---90562124330.pdfIn PDF document text
    • http://ticketsperiodico.com/galeria/files/jedaveb.pdfIn PDF document text
    • https://hw-power.com/uploads/ckfiles/files/61378c576aa5a.pdfIn PDF document text
    • https://spotiverify.com/ci/userfiles/files/79088908027.pdfIn PDF document text
    • http://koyomisushi.com/uploads/files/tovozelirusasunuka.pdfIn PDF document text
    • https://3rproject.eu/ckfinder/userfiles/files/39658760761.pdfIn PDF document text
    • https://educhina.mn/editor/files/44609613716.pdfIn PDF document text
    • http://studiotecnicopetrillo.eu/userfiles/files/jofowaneg.pdfIn PDF document text
    • https://bahispesinde.com/gnc/veri/_files/8740232555.pdfIn PDF document text
    • https://chupwo.com/editor_upload/file/merib.pdfIn PDF document text
    • https://adikkeempat.com/contents/files/10279644780.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b304764f79---45498036314.pdfIn PDF document text
    • https://tempatpasang.com/contents/files/risonobutokazuba.pdfIn PDF document text
    • http://penetrat.ru/files/files/53386204161.pdfIn PDF document text
    • http://suvagcentr.ru/userfiles/files/78158737239.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=android+9+wifi+wpsPDF 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_off0000eda5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA5 18240 bytes
SHA-256: 7f94ff2495bff857ffecb922f769e7b97373cf4ff9b195cab60f87a4b3c70174
font_01_sfnt_off00011d64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D64 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001357b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1357B 10288 bytes
SHA-256: 98104367499d514b2cd8fbb64fa59ad7d1e158a699b96c12e6b412196e583856

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