Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fcbc96637e196d5…

MALICIOUS

PDF

152.9 KB Created: 2021-07-03 18:28:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: d6cd9f3cc61424b434997835a441c684 SHA-1: 5b8a7fc14107982d04c609cf6db5aa608b767802 SHA-256: 2fcbc96637e196d59cc090efc5bf5320e44756ff32a3fb2583d602570941b9fb
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm. The presence of these links, particularly those with 'utm_term' parameters, indicates an attempt to direct users to potentially malicious or phishing websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 6

  • 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.
  • 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://pixomot.ru/uplcv?utm_term=new+zealand+bill+of+rights PDF link annotation
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/ncv9b2agi8ki2498qvrb7qg49j/16943775609.pdfIn PDF document text
    • http://heibldr.hu/FCKfeltoltott/file/78504719692.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16088001dddbb3---58518991713.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/65f4g1mct6h9g0m8uer0a7fphn/5183014819.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c8885c40a82---lubotogoboka.pdfIn PDF document text
    • http://wchs65.org/clients/b/bb/bb65574a37642f7fe3135935df861e67/File/26471512969.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160882c737f201---wivumuge.pdfIn PDF document text
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/49236878030.pdfIn PDF document text
    • https://protectname.xyz/whoisprivacy/userfiles/files/95813834543.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/lqk15accre5ojuolm6md737oma/fokorepaxorosapetuxilu.pdfIn PDF document text
    • http://opakowania-loga.pl/zdjecia/fotki/file/nobezetimelugigefuxaki.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/xojaza.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b64a559ad5c---25365692454.pdfIn PDF document text
    • https://visionbrindes.com/admin/fckeditor/userfiles/file/wukowamisupotinonotajove.pdfIn PDF document text
    • http://decamiones.com/userfiles/file/lilovakefikejedevewobad.pdfIn PDF document text
    • https://astek-telem.fr/userfiles/file/kakaxu.pdfIn PDF document text
    • http://septumdent.com/img/userfiles/files/xoturitu.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160ad424a98560---vikul.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/0f2f17036fa7af44a2b06827eeea36c0/38930308756.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/ltcm5hkss19f58vg719fpq4ht6/rikobikisenolotus.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/jadeximabisidubewijam.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/d6a8913ecb0829137d7bacd17dce2cd2/23400792646.pdfIn PDF document text
    • http://phantasos.org/userfiles/file/mefidukunepen.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c378c3b6e40---dixafebisogupojikip.pdfIn PDF document text
    • 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_off0001f4ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F4BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00020ccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20CCC 17732 bytes
SHA-256: a3b1fbeb01102f0ce8561ee96503c77a04685991ecb525a0b6e633ed4e61f92d
font_02_sfnt_off00023b55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23B55 10896 bytes
SHA-256: 34234fae65be0d84c7a63c3947a7f1205e51e86f7c83aacad85c07afd2c3af48

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