Malicious PDF — malware analysis report

Static analysis result for SHA-256 878706d390daa01e…

MALICIOUS

PDF

82.7 KB Created: 2021-08-14 23:47:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fe461c0d559ff288f58b48f288fd3ec0 SHA-1: 0974e0cca253beb5cefa1ce67b448036123215db SHA-256: 878706d390daa01eb5e2d510fb4a9cbafd86ef8539d4733037f9fa565fc2f0b0
212 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a payment redirection lure. It contains numerous links, many pointing to compromised WordPress sites, suggesting an attempt to host malicious content or redirect users to phishing pages. The embedded JavaScript stream further indicates potential for malicious execution, likely to facilitate the redirection or download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.
  • 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 https://archism.ru/uplcv?utm_term=how+to+import+ics+file+into+outlook+web+app
    • http://www.benyowsky.com/resources/files/gebuxurazolamasitopoxije.pdf
    • http://abacusnancy.com/userfiles/file/65500558544.pdf
    • https://jackyrouxmethode.com/userfiles/file/84591858940.pdf
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/71f1470acd56574cef8e30347d458cdb/nufofadu.pdf
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/9ud4m10aah8atqo2gibef1dcl4/62550243956.pdf
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/sspavi21a2nf96ivfiaa9qpfil/81646712358.pdf
    • https://jungleflightchiangmai.com/Uploads/files/38756233830.pdf
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/f287fda0a1cd2ae1be866ff1e4502ae6/fibilurasavorojirat.pdf
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/7464b547f0c3c498d9b6c625ef132138/moropuxowisorete.pdf
    • http://all4pets.cz/ckfinder/userfiles/files/getedokevu.pdf
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a90b4ec9afd---10869807056.pdf
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160907c79973a8---fepifatewa.pdf
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/16098a247cb6b3---vapewokelafip.pdf
    • https://ekransamara.ru/files/37396566450.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5463cb2e8e---1456793852.pdf
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ede07663a60---43509309702.pdf
    • http://cathyourhair.nl/js/ckfinder/userfiles/files/lipefesumule.pdf
    • http://ags-sib.ru/ckfinder/userfiles/files/47575004637.pdf
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/161114bf832cdd---42499961301.pdf
    • https://alexandrapanayotou.com/web/images/static/file/63930247019.pdf
    • http://wasserburg.pl/userfiles/file/57275327572.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f24f555873---55011081992.pdf
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084544905ab5---xudasujanomerawefoxebawiz.pdf
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b5bfda4d946---lajofazisugapijosunuvutof.pdf
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160d2a3ed541e6---ruxomowavivor.pdf
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/eb0rn61d3qepkrjb8ttrkm2i26/rulin.pdf
    • 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_off0000dd14.bin
066ef1dd7be7c594af3f7a35547c8a4b964d8bcd5c88140cde5dd9849b701021		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD14 11052 bytes
font_01_sfnt_off0000f6a1.bin
d163cf63a4c5c3e6e1ff1e6888bf28638250c09e65f134c8d1b96519632ce78e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A1 17644 bytes
font_02_sfnt_off000123bc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123BC 16792 bytes

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