Malicious PDF — malware analysis report

Static analysis result for SHA-256 c717e45fb157c73a…

MALICIOUS

PDF

68.5 KB Created: 2021-09-27 20:02:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c67807adf5ddb6818ba4e6811d74e797 SHA-1: c7724f172db23ffa7fa0098ba7e277f1ef31a854 SHA-256: c717e45fb157c73a48d3ad07c4ed4868a540c811f74a7272696af76b49a335b6
176 Risk Score

Malware Insights

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

The PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains a high number of external links, many pointing to compromised CMS uploads or disposable hosting, suggesting an attempt to redirect users to malicious sites. The heuristic 'PDF_IMAGE_LURE' indicates the document likely presents a screenshot to obscure clickable actions, a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://a-pro-peau.fr/userfiles/file/9411973928.pdf In PDF document text
    • http://floralojistik.com/userfiles/file/bovazebumu.pdfIn PDF document text
    • https://open-call.fr/uploaded/files/8151784079.pdfIn PDF document text
    • http://studioesflores.pl/obrazy/file/fudalu.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/161447fe87f91d---kitirixofobawunevemobemo.pdfIn PDF document text
    • http://wish-pharma.com/upload/files/sudolewufifu.pdfIn PDF document text
    • https://clifestyle.net/uploades/userfiles/file/gamupolaliroxisadakokot.pdfIn PDF document text
    • http://www.kizkulesikizogrenciyurdu.com/public/ckfinderuploads/files/teruzarub.pdfIn PDF document text
    • http://kidneytracker.com/ckfinder/userfiles/files/xebagiwarejima.pdfIn PDF document text
    • https://lux-ride.com/home/u4-6pzgszajsb5u/www/lux-ride.com/public_html/ckeditortest_WORKING/ckfinder/userfiles/files/25184326415.pdfIn PDF document text
    • https://inprovitbolivia.com/ckfinder/userfiles/files/40078425517.pdfIn PDF document text
    • http://lifeisartfoundation.org/sites/default/files/images/userfiles/file/86968406917.pdfIn PDF document text
    • https://makenie.com/upload/files/25103825982.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/dee1d2155b9e10b212547737e4fbcd25/nebikefabemop.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/c9d53c6d0a471168a54a1ceead0d198a/vasakasadenoxiwulobivulo.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ced4338514---moxaguwodonizupe.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/161446738ecc4e---77302694703.pdfIn PDF document text
    • https://keyword-lda.pt/site/upload/file/7679928439.pdfIn PDF document text
    • https://novahealthclinic.ca/userfiles/file/90272463027.pdfIn PDF document text
    • https://amt-alarmy.pl/userfiles/file/11657171224.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614bb1bf9256c---4616370093.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/161303b94434dd---wegodapejofesejumuzawu.pdfIn PDF document text
    • http://itexpertdog.nwoasis.com/upload/files/15723759477.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f063fcdb8a---xerewisevinijanababo.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614c699e6f7e5---19534965547.pdfIn PDF document text
    • http://oletrans.sk/editor_uploads/files/96005718957.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=remove+system+uiPDF 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_off0000b30e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB30E 13852 bytes
SHA-256: 0d8afe8ac1603f527ecfb18b04fce5854056196f7cd5e73b91e4a6c78715d085
font_01_sfnt_off0000d584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD584 10184 bytes
SHA-256: 54da159d496f2cf5267624a9621f5f46e10a0a73046130bce5a96294b40a7a25
font_02_sfnt_off0000ec72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC72 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1