Malicious PDF — malware analysis report

Static analysis result for SHA-256 d900e2a1fe783266…

MALICIOUS

PDF

73.2 KB Created: 2021-09-07 00:23:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 07aabe59b1e24a3fd415e22e6c64d14e SHA-1: 573bffd5910d03528065a66dda4a4055ca2c6fa0 SHA-256: d900e2a1fe783266b98684cab6c1c3e94a94e08029c4b4da535aece4477dd63f
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of numerous unknown URLs further supports this phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 https://blsautomation.com/ckfinder/userfiles/files/dejol.pdf
    • http://camionespanamericana.com/userfiles/file/digulisum.pdf
    • https://airflow-skateboards.com/userfiles/files/kagifexafitopinatedib.pdf
    • http://eternoohydro.com/d/files/34202892395.pdf
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2774b1d252---63785007100.pdf
    • http://vcelari.naceradec.cz/includes/ckfinder/userfiles/files/56177744797.pdf
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/1c5a1ko937c48oo94v09nb506n/wufoxixapikepubome.pdf
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160840b2b8546c---46363701198.pdf
    • http://broadgatecapital.com/userfiles/file/nijiredapago.pdf
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/740bkunt2iaiqjfjti4t3djrgv/67408848770.pdf
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160f06dc53bcc9---jilupabevujifunere.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9e073e973d---tebofokunibopobege.pdf
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/10137358bd5a4e5f17d39e9cd89bc99f/lubosasubuwinawomisuw.pdf
    • http://briztravel.com/upload/files/75213842618.pdf
    • http://maxgear.cz/webpagebuilder/ckfinder/userfiles/files/53463273584.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e51a634357---daxafaz.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608284d03c868---61842688585.pdf
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160736947844ba---peneletileg.pdf
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/c189e2368ee68ce5dfe929291f237a39/bavupewubebiwumarubuz.pdf
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/49ff7ff6227d2dfa882ea3abfc3df3d7/95685032918.pdf
    • https://corpusbg.com/files/fck/file/93226480119.pdf
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073b4f51c361---41043720504.pdf
    • http://goodwill.pl/userfiles/file/suwixifaxulurizuzem.pdf
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/5a8d6d56155eb6cd8a31be20f55fa064/duwobukoriroxabatuma.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=csat+paper+2+2018+answer+key+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_off0000ba46.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xBA46 16792 bytes
font_01_sfnt_off0000d25d.bin
295fc706db560f385cf20964b967c3a46cdcbaa3c619c0e99200f7ccf1afae06
pdf-font-stream PDF embedded font (sfnt) at offset 0xD25D 11056 bytes
font_02_sfnt_off0000ec75.bin
3c642207dd2fc1b10d34c98952ddfb23cff0a26bc1bd853fb4f00dfd9c92af7d
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC75 16552 bytes