Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f70385134037707…

MALICIOUS

PDF

94.6 KB Created: 2021-08-10 21:06:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c1c3ea56373702cf95d849470708519d SHA-1: 1c1d80dcd725f5bc9e8bb46635cf66f3d2b1ece2 SHA-256: 3f7038513403770741aef2368fb88434bf902f09f6770ff20623a7916141b428
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://manavpublicschool.org/manav/userfiles/file/bewerugoxelo.pdf In PDF document text
    • https://batikatravels.com/userfiles/file/55882446515.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c53cd6f121e---wenavatimiwefokusoxipexej.pdfIn PDF document text
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/37bae71dff42fd76b03712890173febd/zalorijixiwubobilefusuf.pdfIn PDF document text
    • http://nawooelcs.com/upload/userfiles/2021/06/files/210607022445.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c897ad23a49---73220120184.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/0ffegmhg4kqunamvmmoreluqq1/3086008380.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0df63d3014820d168396de1b6c2da6d3/dimizoronokejasozatubu.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///zabidosimizo.pdfIn PDF document text
    • http://sns-russia.ru/userfiles/file/sikilewisufufotag.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/ki9kohajbt8v9i9tb9u28pgqa4/nixomesoboka.pdfIn PDF document text
    • http://geluidsadviesnederland.nl/ckfinder/userfiles/files/vavipufojorisibolanekip.pdfIn PDF document text
    • http://legalinet.eu/userfiles/files/dizoravexuxuzaralajex.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd8206c00d---zunemozelibibegu.pdfIn PDF document text
    • https://puntoagricoltura.it/file/fikufu.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/80456071057.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/07188c2806a776db1cc59c09f345ead9/toxunobavinutij.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/pusubemigoduv.pdfIn PDF document text
    • https://masini-de-ambalat.ro/images/userfiles/76042783162.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/32078826015.pdfIn PDF document text
    • http://canadapremiumlubes.com/survey/userfiles/files/pogugeroj.pdfIn PDF document text
    • https://angkagenap.com/contents//files/18148207887.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=archery+elite+mod+apk+unlimited+moneyPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eda2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000105b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B3 16384 bytes
SHA-256: 6bc4420bbfa61156f096b6f0725168f8601d7500e332933a6f3144c23c09a2fe
font_02_sfnt_off00011bfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BFE 10896 bytes
SHA-256: 0e5a1c5c386c77da4fc1e3102111867960d9ed534fbe09ef42f9c6246719264f
font_03_sfnt_off00013502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13502 1720 bytes
SHA-256: d7fb56bbc8a77a811103eecb7c8b28e87cb3bc94d20c1f0e8b8c4c01425b6c13
font_04_sfnt_off00013d25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D25 17720 bytes
SHA-256: 32b9e74055bc613f30ff5d18dc786b42b92ebd008f9ffd300022611eef46a2de

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