Malicious PDF — malware analysis report

Static analysis result for SHA-256 f62dce2693cdb836…

MALICIOUS

PDF

103.4 KB Created: 2021-07-24 23:47:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f565edc44bd587e357a5d231544a7f10 SHA-1: 39e627a53595be52d0b5f4b37b98d658279b4b53 SHA-256: f62dce2693cdb836222da03d27490e2fe30f55a503f16925361297a8c4c67623
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised CMS upload storage, suggesting an attempt to host malicious content. The presence of external URIs and a high ML score indicate a strong likelihood of phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608cded9bab9e---63859098828.pdf
    • http://studioghittigargnano.com/userfiles/files/nonizobuzepavanim.pdf
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/e7a8553954ae269731a81903a3dac50e/2189018580.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/8c27a466c0006012eb6345ee174a1dd0/logidejivufo.pdf
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d19ffa1ea0---53292901910.pdf
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/fbd2e9706c4f030aed489c18747a1b02/39162701473.pdf
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/8sjkrvatldtsr3c7i0fcu2a034/89725486372.pdf
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d660caad712---kuzotomozome.pdf
    • https://4appsoftware.it/file/rorubarizozalegefesuzob.pdf
    • http://scuderieverdina.it/scuderia/userfiles/file/10051171249.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/2984c396ff79c861cafcdfaa1a9e4af1/5527559965.pdf
    • http://garderoba.sk/images/_file/nasepobegojedi.pdf
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/23jut7cum7ekv010f3244tghad/12473868357.pdf
    • http://njf724.com/basefile/janatalnajafcom/files/wogog.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160c4290c5a88e---roton.pdf
    • http://ytovietnam.net/ckfinder/userfiles/files/mitaxavubajupeler.pdf
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f6af6f59a---31210458923.pdf
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/np2btjfh5ojmuadul4k0sb68q0/duxulixomamuruviwemada.pdf
    • https://playerpress.com/ckfinder/userfiles/files/78308645252.pdf
    • https://www.foundationofhope.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9bfe8e956---ragabigetulakeriz.pdf
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160844e431314b---nidawiri.pdf
    • http://clubesquilacoma.com/uploads/files/3924787048.pdf
    • http://vickerycarpet.com/uploads/images//files/98842006977.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=marvel+films+in+order+of+story+reddit
    • 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_off00012cf9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF9 16792 bytes
font_01_sfnt_off00014510.bin
8d08147f768593ad226301991c410928e48095cba81e586b1e98a43481a1124b
pdf-font-stream PDF embedded font (sfnt) at offset 0x14510 10688 bytes
font_02_sfnt_off00015d91.bin
0466bd1462d12259763537418d97b8bab1853290a7329e59a0f68d070199df4c
pdf-font-stream PDF embedded font (sfnt) at offset 0x15D91 18120 bytes