Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0bfce0cf41332c7…

MALICIOUS

PDF

79.9 KB Created: 2021-06-30 11:03:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ba7989e496026cd26e40290f3958cdd3 SHA-1: 051fc9b91eea8aecd4c8bb8d62b05f9e2d2c3edf SHA-256: c0bfce0cf41332c76da5854106d890a17bd858f163d891df05a868ebe6ac6943
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to various websites, many of which appear to be compromised WordPress installations or disposable hosting. These links likely serve as a link farm to direct users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://synerhu.ru/uplcv?utm_term=online+csv+to+vcf+converter
    • http://w-f-l.de/user_img/file/43891808287.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8de02ac2a2---97417853381.pdf
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/3eb7eb865ba865225626fddc20a9b065/65509591765.pdf
    • http://armanetti.com/images/73866793106.pdf
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/2tudiekteqeul0419v31piv2hj/76887508401.pdf
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/eab0e516b329a72973a5cf4183084097/59930668887.pdf
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/bffdbe9f97da3dd95fe06511af4516b3/vobelufob.pdf
    • http://akicgiyim.com/userfiles/file/46924856839.pdf
    • http://learnazia.com/fck/imagesfile/zanelirazeto.pdf
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b57eb40abb1---rexirize.pdf
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16085f5c677dda---28518307004.pdf
    • http://p-itos.net/admin/userfile/image/file/58002663619.pdf
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202105010931512614.pdf
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a098ef00433---gujidekis.pdf
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/2ab6a55ce4b73b8e02657e61e812c6b6/47534612867.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1608a33635f9c9---73625053792.pdf
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609852cee7ad8---43386595941.pdf
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c0ee7d90886---somememufimodikoxanit.pdf
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/25b448b9a1035adb7ae136bf79d25c62/94300311440.pdf
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/jp77i69ioa8gjae60nbm2bs5i3/58201215203.pdf
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/vdo04t7acq22t8ri12eov2kta2/38505221749.pdf
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160898701d6f23---71115672773.pdf
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/93fbb1c9b0b784d1eefaaaf376d3daea/limir.pdf
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607681c2b0cb4---32382330994.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_off0000d0e5.bin
5c2d0c35292bcc489c084adb572ce81ba86bf5c834aae7d8fd6bc94957bf5d04		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E5 22156 bytes
font_01_sfnt_off00010333.bin
b392e00e6aa6d07667e9fbfa9129c6e27a13186cf14ac0826209abfc9e6b8699		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10333 10260 bytes
font_02_sfnt_off00011a71.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A71 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.