Malicious PDF — malware analysis report

Static analysis result for SHA-256 267034696c548626…

MALICIOUS

PDF

89.4 KB Created: 2021-06-30 12:23:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 15e4f912473cdbfb48e75d5c4c388cc7 SHA-1: 5101e95dabcdf440ea2d5193d96d5fc5fbd84088 SHA-256: 267034696c5486267c28eecceca90dd88d6309dc9361b29051ee564e09b5ffb8
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress upload directories, indicating a link farm designed to host or redirect to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, so the primary attack vector appears to be the embedded URLs.

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 http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5956e0559---wobovafavopetimizejupub.pdf
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/755d7530dcf69b5e49543fd341e61090/3409791078.pdf
    • http://fixafilm.se/userfiles/file/muxesozeganiwoba.pdf
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16095500834afe---42437247061.pdf
    • http://yaqeen-eg.com/userfiles/file/midiwixumomivan.pdf
    • http://anatolianlgs.com/userfiles/file/visupexumobitixabivesegen.pdf
    • http://animationcoach.com/userfiles/file/nurakaf.pdf
    • https://pathakpharma.in/singhania/downloads/file/96033215990.pdf
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a9cffc3f7f5---8363518726.pdf
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/5n6gjre7i2eg6mgi5h5qmoim31/busopupa.pdf
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/rgb0847osbetocnadro1fhvaik/fukeliwomokidetel.pdf
    • http://baigeleather.com/userfiles/file/75340306929.pdf
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/2ip5p0s9bo27lothm0n0hh2gks/95954989961.pdf
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609417f23c505---mevig.pdf
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/lbuur1hq4vrudbjkhp3fgsgofo/zeral.pdf
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606c907f5586f---62786774833.pdf
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca676c0243---jufumif.pdf
    • http://jadever.vn/Images_upload/files/fodinin.pdf
    • https://kalewebsatis.com/calisma2/files/uploads/52277365017.pdf
    • https://uclerbaklava.com/resources/file/77527205387.pdf
    • http://daphongthuyhueminh.com/uploads/image/files/26412053494.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/feaef338e6494868148e8ec3c3e355d0/29184354372.pdf
    • http://internationalnetworksolutions.net/files/11788945722.pdf
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/26b6dd2e9471c99c9254066ac0ed4f0e/45956848677.pdf
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/b59678483c9d80b51335666f916be79a/96200773257.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=online+photo+convert+to+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_off0000fa64.bin
043cb2e6484b4d4498419022c2b28126b2094f68fa96f86e54c02dea6a75f2bd
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA64 17668 bytes
font_01_sfnt_off00012899.bin
c104ffdae1fd4dc671150d514a51e679f1c96c867a19630994506960d915ae18
pdf-font-stream PDF embedded font (sfnt) at offset 0x12899 10480 bytes
font_02_sfnt_off00014050.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14050 16792 bytes