Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0a8de27a4145e21…

MALICIOUS

PDF

87.7 KB Created: 2021-06-28 04:45:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2c6d4ad5c96e55c97aa8fa554c0d1b69 SHA-1: 4d39c33fc9e4a35b4225daca27ffe93422b6ad4f SHA-256: d0a8de27a4145e2173619d81e719877c8206805e4aaa503182f661524301d7d9
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous embedded URLs, many pointing to disposable hosting or compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious content. No scripts were extracted, but the overall structure and URL patterns indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://aradovan.com/userfiles/file/9882291224.pdf
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/16075bc12d4033---jonolafaro.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/3d306490d0eb3b2e6953de92b904f4e6/43467105915.pdf
    • http://springbook.no/files/miwusadu.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d9016fc77fc---67439436350.pdf
    • http://3e-machinery.ru/app/webroot/filesfiles/togipetases.pdf
    • http://goref.ru/files/file/rugovudapajutiva.pdf
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8230c1748---51049443515.pdf
    • http://inlovehuahin.com/file_media/file_image/file/67773630743.pdf
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/c636e677ccb62886c086397c853cbfdd/wufovowodimex.pdf
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb74c4c2b0---9892110495.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/lh1djr3tltnsr5pvp0hm3cvke3/fozamojej.pdf
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/4e8dd9d017fbe8ea970d19f70e43a6e5/95408143183.pdf
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/om9ib8fnsghlc555cr7cr0onp5/17464641568.pdf
    • http://cancercareresearch.com/userfiles/file/pulaxanexozefilurob.pdf
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/1381aa7c81bbf4ebd44ecf9449ee98b0/4096663703.pdf
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/1aee5140fa0bb0b9823ece6457ca0f63/rukiwak.pdf
    • https://atamergranit.com/userfiles/file/82676143227.pdf
    • http://www.johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/fekugalenapuvivu.pdf
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160814e3fed587---24234998375.pdf
    • http://zrdb-drogbud.pl/Upload/file/jirugogagugofolugisus.pdf
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5d4c371b24---83044680196.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=jee+mains+2021+topper+list
    • 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_off0000f772.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF772 16792 bytes
font_01_sfnt_off00010f84.bin
5182cdcb0e27a6edf521df2732c191f4f6ed2e6944538231d706113548e9cbcd
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F84 15968 bytes
font_02_sfnt_off000138f7.bin
9b9e6d3e6f23cda29fee8f9c2c1f579d681af96793882493fa0b2a35e384f664
pdf-font-stream PDF embedded font (sfnt) at offset 0x138F7 10696 bytes