Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a9d6240d206ccaa…

MALICIOUS

PDF

134.5 KB Created: 2021-06-30 04:50:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 40ad0a98269f4469c998ceb3996359d9 SHA-1: dee9b867b65d010d161b08c1eb2193139336b44e SHA-256: 7a9d6240d206ccaac6c9259ffdcb1ae31439f0e0693ec1e46c763a432b938b6e
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and link farms pointing to potentially compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were extracted, the structure and numerous links are indicative of a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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://sahamit.net/userfiles/file/14593418317.pdf In PDF document text
    • https://italvaping.com/file/tiduzagisojoxareso.pdfIn PDF document text
    • http://kimhoatra.vn/upload/fckimagesfile/53220758156.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbf8e418c2e---44368540036.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/fp6d84a0lfqmt3pp486tjkjtr4/goreluluvamaka.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16071490169254---85427108301.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aba28bbc643---86694315463.pdfIn PDF document text
    • https://maydangson.com/vietkiendo/upload/file/pobatozizuzupokomitokafe.pdfIn PDF document text
    • https://wegofa.com/userfiles/file/tirumodogodatuv.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071ef99209d9---23361782658.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/2b3ffcc3472d75dc2ba821b426d4e968/19700678012.pdfIn PDF document text
    • https://weeb.nu/userfiles/file/75463376704.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/4212147337.pdfIn PDF document text
    • https://dprkoreatour.com/uploads/files/sawima.pdfIn PDF document text
    • http://yuha.be/_files/file/5693819592.pdfIn PDF document text
    • http://tylincms.com/userfiles/files/63377528903.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/9j1to3lchese176c22nbcbgqlr/84213588806.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160836c3049412---sakigajo.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607122c498f28---xikifinadilajuvepep.pdfIn PDF document text
    • https://safrano.pl/userfiles/file/zebefetimeputuxekowo.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/7511890627.pdfIn PDF document text
    • https://egyptsuntours.com/userfiles/files/vajadikizusax.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077923b43232---77028272974.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=statement+letter+examplePDF 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_off0001ae8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE8A 10212 bytes
SHA-256: be0790900123c687082c61e5bb7df8150ef023136aaedf3f9e9f892ba02aadf4
font_01_sfnt_off0001c56c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C56C 17940 bytes
SHA-256: 58fee19c2d2a8283efa681115746eb3988b687afe8ebcb3175b471b4c216766d
font_02_sfnt_off0001f454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F454 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1