Malicious PDF — malware analysis report

Static analysis result for SHA-256 78234d19af2c2a9e…

MALICIOUS

PDF

84.6 KB Created: 2021-09-05 16:42:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: bfa93b46f3dff15be16842ffba66a314 SHA-1: 79445d9c8a5c3e8eeed3286cf252978765359c8f SHA-256: 78234d19af2c2a9e44be11b9e3b2194ed596b883b18b500b7ba0590dfd2fa8b4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. It also features a link farm pointing to numerous external URLs, many hosted on compromised or disposable domains, suggesting an attempt to obscure the final malicious destination. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9834

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
  • 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://nfc.soo.jp/file/46049569965.pdf In PDF document text
    • https://classconnbio.com/img-jacson/files/xorovimodixina.pdfIn PDF document text
    • http://inglewoodreunion.com/clients/68690/File/99037750450.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/161334fc63a1e1---rezadebawodubegara.pdfIn PDF document text
    • http://gospel-pour-100-voix.com/fichiers/newsletter/file/xuzazisuxijobus.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/qecafblq2d0ho4k75qa1igmrk3/vubukusuginiminepiwazos.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16072913d8b040---jopijabu.pdfIn PDF document text
    • http://nineslash.com/user_file/file/ferinoxaviwukekasef.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/9g7cq6pnnngqcar5qk56aq8286/mofolapurojikiwizegovusog.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/b1765efa9bf00abb638f9e993119d70e/28687539812.pdfIn PDF document text
    • http://tanabuauto.com/js/upload/files/redaw.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/2n6bruams6punqpnvupb9t0bsd/77258267780.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/adfee3f5fd49d344ae5c56641cdae27f/lakitifurazafigil.pdfIn PDF document text
    • https://genegurumiraclehealer.com/userfiles/file/sifafikufagafojatinakur.pdfIn PDF document text
    • https://newshieldinsurance.com/demo/gsa/final/images/file/55685595861.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16086f40808938---kolanizetogete.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/4758197819.pdfIn PDF document text
    • https://medarbindia.org/ckfinder/userfiles/files/67359149368.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ec38c41c0---zidazuziwipajuban.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606feca901d05---bibozopunobos.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/578800a5f7fc9a8533ba3d8dc6ee7638/xevefunagafoxifofuj.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/16683b30e18df9318bba23bf3cddc25e/48267845550.pdfIn PDF document text
    • http://ondrejkocar.cz/img/file/dimerelefijurutevapile.pdfIn PDF document text
    • http://coiffurenais.com/userfiles/file/mopit.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/18baece0d4b4b4c11daf7ce4c8f0bbc3/43158903524.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6a29c0b783---63157467341.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/8227d1014bef51486a3209771952c082/76364006173.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=integral+practice+worksheet+pdfPDF 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_off0000e40c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE40C 11028 bytes
SHA-256: 4a7d6953ef48501a76a7b30303c4fec90ca3f33b74e1f09cee87bfab5d707ac7
font_01_sfnt_off0000fd74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD74 18272 bytes
SHA-256: dacfeac237206158aab437945a3f918a54421a3b124d27f029c734c42485e13e
font_02_sfnt_off00012cf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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