Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9de7d3ab7d94fea…

MALICIOUS

PDF

92.0 KB Created: 2021-08-25 17:03:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f50b1d8cf7cd1ffe492c50dc31931316 SHA-1: d170005ab842d488d6ce21b4bd084914cf37d6b2 SHA-256: e9de7d3ab7d94fea9724ef290d5a0a368fab4f2b04162b895a6c792c10bc1eb7
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document is designed to trick users into opening a password-protected archive, likely to conceal a secondary payload. While no scripts were directly extracted, the presence of numerous links to potentially compromised CMS upload directories and disposable hosting points to a distribution mechanism for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://alkanboya.com/files/file///42081778921.pdf In PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16078286de9a44---nawugatubudufuvogubij.pdfIn PDF document text
    • http://domholidays.com/userfiles/file/4145868807.pdfIn PDF document text
    • https://nicosiacaffe.it/file/29712344014.pdfIn PDF document text
    • http://nsdadventist.org/FCKData/file/47147173484.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609968896ff6f---73853807775.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/49706d74c3816be9c7a2533dc46c1413/radofupesaminunazud.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/94003555861.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/mtie5sed2oo7rbh4s3i39a47u0/68335061491.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160851f6d26972---laripubowodaj.pdfIn PDF document text
    • http://sevennews.com.br/ckfinder/userfiles/files/foresowogujulurowon.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074115ba13c7---forurixazuxu.pdfIn PDF document text
    • https://lidiyageorgieva.com/ckfinder/userfiles/files/55613098750.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089710541eb6---ligusugedoxaki.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5fa94f31d---minutokot.pdfIn PDF document text
    • http://culbertsonlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/77334855687.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083ecc74b91b---muxibesukuligeve.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609a96a7e945b---16634402747.pdfIn PDF document text
    • https://lazerom.pro/media/file/kigojubaxedirixuso.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baa64ef0da8---zarule.pdfIn PDF document text
    • http://colescastle.com/clients/875019/File/71304595936.pdfIn PDF document text
    • http://lawrence-spruill.com/clients/42275/File/62647911084.pdfIn PDF document text
    • http://mclarenquartz.in/ci/userfiles/files/sanesafiz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=apk+hacks+androidPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ece8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE8 10408 bytes
SHA-256: 33c72f25d23e5e07bea05fc93bab086ad41101cafeda8526681cfb16b8f6e9d8
font_01_sfnt_off0001046c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1046C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C7E 18400 bytes
SHA-256: 31526036eacb9d449cf4f2a73f1f1363ad3b39e225ed75cd69c417308c2daa03
font_03_sfnt_off00014bcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BCB 16312 bytes
SHA-256: 7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae

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