Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d74a75a293497eb…

MALICIOUS

PDF

89.8 KB Created: 2021-07-02 17:43:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b75225e9fe174cf4bc0d6f75fb4b94c5 SHA-1: 7db38c9b32ca1e8b44b9911f4d723925ec3163c0 SHA-256: 9d74a75a293497eb1c05627df1523a63a2a42234adbad7aa571be56cbb13d758
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The heuristics reveal a link farm structure pointing to compromised CMS upload storage and disposable hosting, suggesting an attempt to distribute malicious content or phish users. While no scripts were extracted, the PDF's structure and URL patterns are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b7a7dee309b---lofuretapaferenufewisepe.pdf
    • http://angelojrobles.com/admin_initial_test/userfiles/file/xatekosewofinopakeko.pdf
    • http://www.rannatennis.ee/data/upfiles/files/roropezoredenubowekiwona.pdf
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/dc8e8ff0f312e1767449f2da1fd99dad/topole.pdf
    • https://sklep-pinokio.pl/web/uploads/files/89595917864.pdf
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160745378dfc70---pafaxinize.pdf
    • https://open-call.fr/uploaded/files/1475047278.pdf
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/9abd9bd23d82cbccca42c9633789405e/mukaguke.pdf
    • http://ecohort.com/userfiles/files/kotifekuxebasetoxomuno.pdf
    • http://guowangcable.com/d/files/xakusevovogilanowevimilu.pdf
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c8aa2c124ba---suxinil.pdf
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/0749bbc1b403ab54b06a61f8580b71cf/93280905388.pdf
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/3cc0de6f4b7b34851ef6e1abbac84297/14726121081.pdf
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/9a630aa116b16f8d22f510e9e58c2231/89362681947.pdf
    • https://iamtimeshare.com/userfiles/file/kibisidokufabumu.pdf
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/f1b28f970b2998c713b328de69cfc53c/24852632205.pdf
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16080d71c25860---45213371958.pdf
    • https://emprenderem.cl/files/tuwavavuja.pdf
    • http://xz-brand.com/ckfinder/userfiles/files/miwizugekalejer.pdf
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/abc0ff22haiakd1jacgn0m07kr/88259591245.pdf
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608f43d804d18---setisafuwumomezu.pdf
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/afb48b06a57a37197078f00561809dc0/50927171035.pdf
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075010386288---60042163350.pdf
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/a875aff5b675611944c24cb2ddce8eb0/99824959717.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eca853a282---rilogutilobapo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=andes+mint+sheet+cake
    • 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_off0000fb5f.bin
b1800c61eefbc88f8becf195d94b04383dc5740be7111b57e4f93f29dcdc05f6
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5F 17856 bytes
font_01_sfnt_off00012a52.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A52 16792 bytes
font_02_sfnt_off00014269.bin
a8971826305a96e4a81ceb45d43c15426d0d56636b4970f0d034a35673150997
pdf-font-stream PDF embedded font (sfnt) at offset 0x14269 10444 bytes