Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9d63f648a1dd3cb…

MALICIOUS

PDF

74.3 KB Created: 2021-06-25 22:26:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2fd048ab87472a1e3acce1ba5dcedafa SHA-1: fe3c5482c2932c47402c40aa3029cad56956cdf7 SHA-256: e9d63f648a1dd3cb54e238f79f18102b004eee83e099d87ef35e63a68f10a9e9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

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 http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160727feea5e8a---fodogesi.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd93033861---14824883485.pdf
    • http://minutemen-jrotc.com/clients/84940/File/bopekafexadedifuparupebo.pdf
    • https://narimasu-chintai.net/jcfiles/file/85310464337.pdf
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/6f0b879a40b1f777228b89146619f9a6/90168852463.pdf
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c55bcf5e9c3---tesojimizakuburisazudin.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/50379ce6276b7941cf2e889098bc8330/seduvozejifixozakad.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/45ca3e406e47fd38c28d48df28040610/tisajosixifigebug.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/47bfde18090b3e99a3a176b961b3a32d/80741624281.pdf
    • http://hobbstownis100.com/clients/6/66/66141d04a4341350d76ae3a38785cb5a/File/suxufelanotemo.pdf
    • http://teranor.com/ckfinder/userfiles/files/rejujegoramexive.pdf
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/72b261c327a5ace04358b7579bbcabe6/wunijeti.pdf
    • https://ljlconst.com/admin/images/file/bonomeribaruroz.pdf
    • https://sonarmusic.hu/up_image/file/3944444386.pdf
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/7133c46f9ba7469a6d88cd6443a99d0f/55845592904.pdf
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/0e33fc98fdcf83b2b9fc075b22391f5c/2599067235.pdf
    • http://nowyhotelik.pl/userfiles/file/17680074968.pdf
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/806181a83aa9bbdc3a6c0b60bf36bcfc/42052219036.pdf
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8a38c97d1---jelazogaki.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/01e7831a7cabf0ca4ceca1ec0e902f27/96228035812.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a45f3f70379---45541329506.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac90dcddc35---lazemibegofimebinane.pdf
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/8fa6555e7e7c3da2b792e0a93c159198/lesujapuxipexubore.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d3eeb9af9---nilobogojata.pdf
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1607dcf6fde580---30423743161.pdf
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160905816aaa46---bugefopalikofebevawemizox.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=the+contract+movie+1999
    • 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_off0000bf5a.bin
c6346476f7bb845632a7e55cf09e1545befbe9b7bb9b16e5fd745f995eeac5e3
pdf-font-stream PDF embedded font (sfnt) at offset 0xBF5A 17160 bytes
font_01_sfnt_off0000ebf9.bin
e35427b023d1244965ce668d2a5ce667b4e866afb951b9a58480ae7f18daab68
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF9 10532 bytes
font_02_sfnt_off000103de.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x103DE 16792 bytes