Malicious PDF — malware analysis report

Static analysis result for SHA-256 959fa62f1b7d5892…

MALICIOUS

PDF

83.4 KB Created: 2021-09-17 19:45:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 0ce09624fad7f18248f626fc777c1d11 SHA-1: 07ba66eed44d1adf9d0defa07465cb016fa28766 SHA-256: 959fa62f1b7d589298faa5e69674fb8426cb0e2f6085de6fcf17486914c049d1
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, including a link farm hosted on compromised WordPress upload storage. The heuristic 'SE_PAYMENT_REDIRECT_LURE' strongly suggests a business email compromise (BEC) tactic, aiming to trick users into believing they are updating payment details. The presence of embedded JavaScript indicates potential for further malicious actions, such as downloading additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 8

  • 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.
  • 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://sujitonweb.com/userfiles/files/mosujavanibapagolori.pdf In PDF document text
    • https://ewdel.cz/ckfinder/userfiles/files/76871388133.pdfIn PDF document text
    • https://sensormaticltd.com/app/templates/js/ckfinder/userfiles/files/54798490332.pdfIn PDF document text
    • http://neodermclinic.com/file_media/file_image/file/jiwajafa.pdfIn PDF document text
    • https://infotechloyalty.com/bot/ckfinder/uf/files/55400541694.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136f54c058bf---kavazonoziligudutaxomusaj.pdfIn PDF document text
    • http://topp.pl/_topp/file/49152213143.pdfIn PDF document text
    • https://irisapp.cn/uploadfiles/fckeditor/20210905/file/16308358121232.pdfIn PDF document text
    • https://www.jnvhardoi.org/ckfinder/userfiles/files/28872587364.pdfIn PDF document text
    • https://alansglobalservices.com/ckfinder/userfiles/files/rujojevesizivadaju.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/82clou7mh7qucj9v9pl18ppkmi/63969805714.pdfIn PDF document text
    • http://homespakistan.net/magzine/uploadfiles/file/54909467821.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/oglbls96iqbsrk42hcgcu9cp26/mowozafaxelomisojadazemok.pdfIn PDF document text
    • http://nfraccon.org/userfiles/file/91171147669.pdfIn PDF document text
    • http://salman-group.com/userfiles/file/bunuxerunominefemer.pdfIn PDF document text
    • https://sklep-pinokio.pl/web/uploads/files/63355572427.pdfIn PDF document text
    • http://ex2010.com/uploadfile/file/2021091516072673499.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/43805510867.pdfIn PDF document text
    • https://delaneyllc.cfonewsletter.com/ckfinder/userfiles/files/wamatow.pdfIn PDF document text
    • http://tion.hu/upload/file/merekodop.pdfIn PDF document text
    • http://kerekesvillszer.hu/UserFiles/file/gafafutuzokanufezapogu.pdfIn PDF document text
    • http://markone-tools.com/upload/files/buroxaf.pdfIn PDF document text
    • http://highspiritsmusic.com/ckfinder/userfiles/files/44798849496.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=ea+sports+fifa+21+companion+downloadPDF 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_off0000e076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE076 10888 bytes
SHA-256: 5958fb610979a6734f6ed91a6bfed33d9adcf3f072e6d2783e572de9f1eed5d3
font_01_sfnt_off0000f9c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C6 17652 bytes
SHA-256: bf57d6ecdfb70348b406f27bc7e2650ff4db6a549a5eab60a6c7c293d3f98839
font_02_sfnt_off000127d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1