Malicious PDF — malware analysis report

Static analysis result for SHA-256 565bf886811ed342…

MALICIOUS

PDF

87.6 KB Created: 2021-06-30 00:59:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0a7e4ace7e90fafa7ad12fabb0cf4467 SHA-1: 9dd8d69434f2aee9089ccada0eb77615fb34274e SHA-256: 565bf886811ed342ed104efbd64b3757d4826f7e4b742866a7a7cb2664c99652
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Numerous URLs were extracted, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution scheme. The file's structure and embedded links align with techniques used to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • 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.
  • 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 https://crewmak.ru/uplcv?utm_term=diana+fowley+x+files
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608776c325b01---dunekubagolezetimup.pdf
    • http://washchienluoc.com/upload/file/24135977175.pdf
    • https://sealordhotels.com/ckfinder/userfiles/files/19005858724.pdf
    • https://makiriaszto.hu/ckfinder/userfiles/files/boporunitigazuwiwasaj.pdf
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16071e6ff5db99---lapipavubobamopabatox.pdf
    • http://pnmanagementsolutions.in/uploads/57653342648.pdf
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160d3258e9a38c---pidurudotukavomiridom.pdf
    • https://baoholaodong24.com/userfiles/file/jazarexofupus.pdf
    • https://brtim.com/uploads/wysiwyg/files/sefudanuvegati.pdf
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d96095cf6c---nubajokasezurebukubise.pdf
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b888cfdedc1---92584045785.pdf
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/e953afc576ba0ce135ac1bf0ba5a1d41/51935571953.pdf
    • http://amphorabeautyclub.com/campannas/file/88462346569.pdf
    • http://naturalmis.com/userfiles/file/45669296916.pdf
    • https://agroadvanced.com/app/webroot/newsletters/editor/files/6152441973.pdf
    • http://adabaskimerkezi.com/upload/file/rodipeso.pdf
    • http://forter.vn/hinhanh/file/ruwirujakazawunugo.pdf
    • https://arerp.kr/data/file///41710271449.pdf
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee23a91911---40695864087.pdf
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160866cbec5a44---poxexedorisetitapabu.pdf
    • https://a2designbg.com/userfiles/file/lawew.pdf
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081fbc6548e1---60857336555.pdf
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/f0d1731ac1287374d803587a25dc6558/16948803666.pdf
    • https://samsungdvmklima.com/upload/ckfinder/files/noxowalokaxema.pdf
    • https://maychieuvinh.vn/upload/files/koveg.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160906c4e13f4a---susuluzizujulipugadab.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4fa.bin
0775e08d386dcd64474b3240531385d7962fdf411e956178bf5fa73c8d25658d
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FA 10312 bytes
font_01_sfnt_off00010c67.bin
2372269b1141e2671d943dc8ef45b8b0ee7898f4f579d005c28bc46f403eab27
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C67 17272 bytes
font_02_sfnt_off00013946.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13946 16792 bytes