Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c9a32d28397924a…

MALICIOUS

PDF

74.2 KB Created: 2021-08-29 02:48:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1e3019cf8252ea4ab8b6871c3422bbfd SHA-1: e340ee2ea5eb674b15884cb1896d095601714d60 SHA-256: 2c9a32d28397924adf7a91934724da83feabcb038522d7224f4ee18eb59d7c9c
172 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript and multiple external URIs, indicating it is designed to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of JavaScript points to T1059.007, and the nature of the file suggests it was delivered as an attachment, aligning with T1566.001.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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.
  • JavaScript action low 1 related finding PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://terredellamagnagrecia.com/userfiles/files/98626649548.pdf In PDF document text
    • https://natyabio.com/uploadfiles/bagopevamidame.pdfIn PDF document text
    • http://fundacjaproartis.pl/javascript/ckfinder/userfiles/files/29602656404.pdfIn PDF document text
    • http://ourconn.com/userfiles/file/202108070508564018.pdfIn PDF document text
    • https://walkandsmile.com/userfiles/file/99804188323.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/f365469df99c1f1dc37443b56a41d101/xojanisasitokaviw.pdfIn PDF document text
    • http://menloathertonhigh1980.com/clients/6/6f/6f83464fe0b13873896cace574d4baa5/File/wegeg.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/sjmjhbr2v9cvf56im5c0didv5u/76464123081.pdfIn PDF document text
    • http://scuderia512.com/js/upload/files/vetiraxolupefusovozegut.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070f541b8e8b---918968829.pdfIn PDF document text
    • http://m-camper.ru/ckfinder/userfiles/files/74610085996.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/64578006110.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/968jnq7gjcn8598m801r474ld0/tetax.pdfIn PDF document text
    • https://rentcar888.com/uploads/files/202108230531191016.pdfIn PDF document text
    • https://etest.vn/app/webroot/uploads/files/timirovefujojo.pdfIn PDF document text
    • https://byocamacho.com/ckfinder/userfiles/files/kanuxiberodubuviwi.pdfIn PDF document text
    • https://krassimirtaskov.com/userfiles/files/40064946737.pdfIn PDF document text
    • http://epoetryworld.com/clients/53741/File/guwuwutijusu.pdfIn PDF document text
    • http://mindatpeace.us/uploads/files/52486495988.pdfIn PDF document text
    • http://rucodelniza.ru/userfiles/file/79182927359.pdfIn PDF document text
    • https://giustofiori.it/file/jexizabanulajedeliku.pdfIn PDF document text
    • http://hotspot-usa.com/js/upload/files/10447651929.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160800ccdf39ae---kixotido.pdfIn PDF document text
    • http://allgeology.ru/ckfinder/userfiles/files/77348411568.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=tamilwire+mp3+songsPDF 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_off0000bfb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFB8 16404 bytes
SHA-256: cdf3ecf4a38d2dcf99653a10c614e8a5e916d709e42476d6ef1b1612a0fe1095
font_01_sfnt_off0000ea56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA56 10720 bytes
SHA-256: 981cc036052884797c878adc3c72ad7c5277156e0d3baa77d614db80cd91cc50
font_02_sfnt_off000102f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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