Malicious PDF — malware analysis report

Static analysis result for SHA-256 a097ff76a3a19ed4…

MALICIOUS

PDF

90.1 KB Created: 2021-07-29 13:24:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 2fa3b93bd8c821addfa35e804822b690 SHA-1: 50fddb5177790f5cd8435410dc7c659435a4cafc SHA-256: a097ff76a3a19ed4dddb161465419fde96316c55bb66f28416abcc2c3e762fe5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of links pointing to potentially compromised WordPress sites, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is a common technique for initiating malicious actions within PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d12b1b610c---jikujomixijunusidodul.pdf In PDF document text
    • http://soupworld.de/upload/file/7853988611.pdfIn PDF document text
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/s6tt2251j77f4f7emo1oatomel/23241728849.pdfIn PDF document text
    • https://www.tanyadantus.com/wp-content/plugins/super-forms/uploads/php/files/58b2fc181d35d6bfee450f24bb9af3c1/30189649028.pdfIn PDF document text
    • http://carolinaboatclub.com/userfiles/file/geralaxazerafum.pdfIn PDF document text
    • http://studioguatta.it/userfiles/files/79362997557.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/9536c06fbb1c9cd51b6119513606717c/25186056177.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/fa80021ac70178d2dbe143cb9a4bff56/42855220272.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/filap.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/eens79nn4cfl3q19m8u0nhs841/21486020771.pdfIn PDF document text
    • http://cathyourhair.nl/js/ckfinder/userfiles/files/fugoxer.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/nokoje.pdfIn PDF document text
    • http://phantasos.org/userfiles/file/32264975300.pdfIn PDF document text
    • http://mrsinternationalbeautypageant.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/robudutaripopo.pdfIn PDF document text
    • http://kperrylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/64753388270.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c23fd67957---dimefujo.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/volonapetesiwujete.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210710063023_554522542.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/54927525109.pdfIn PDF document text
    • https://ms01bet.net/contents//files/gixowemazesifinodigume.pdfIn PDF document text
    • http://aodaibooking.com/FileData/ckfinder/files/20210725_4C998BCFD5E37F0F.pdfIn PDF document text
    • http://edwardfmcgintypa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/neluzani.pdfIn PDF document text
    • https://bmat.mn/uploads/ckfinder/files/jenudakijal.pdfIn PDF document text
    • https://kovosluzba-praha.cz/res/file/bukolet.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=dostoevsky+notes+from+underground+themesPDF 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_off0000fd84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD84 17056 bytes
SHA-256: 0ce4b1a1463e85292bbcbfe2faa4ab2157c48c04f90ecef54186315b2040c216
font_01_sfnt_off000129be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000141d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141D5 10876 bytes
SHA-256: 7b0aa8ceb7e9a03a7803ee3e8f3e21592ac29c5572034d5f5200baa260a86b4b

Open this report in the interactive analyzer, or submit your own file for analysis.