Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c18dabf879e4dfd…

MALICIOUS

PDF

79.2 KB Created: 2021-07-16 17:04:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9184b0756cee30b9d8977d3a263a554e SHA-1: 681b9fb65f552b0d7da083a6d90e928ed539b2e7 SHA-256: 5c18dabf879e4dfdfc74fdb01faa1c146b65bc8e2b99ff083186a0b46d6b450c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a large number of embedded URLs, many of which point to compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious content or phishing sites. The presence of these links and the overall structure indicate an attempt to exploit user trust for malicious purposes.

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 http://www.anclupnapoli.it/userfiles/file/10445038802.pdf
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be978fc1c5f---rewowuti.pdf
    • https://espaciocultivarte.com/ckfinder/userfiles/files/niwukawajugufix.pdf
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b133c047f63---7658933045.pdf
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071f4d7132cf---87272124346.pdf
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160855cf49014d---47909929382.pdf
    • http://oryginalnedekoracje.pl/userfiles/file/21684169393.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7102042ef---946453453.pdf
    • http://zonweringnederland.com/ckfinder/userfiles/files/36246683281.pdf
    • http://robertoantoniz.com/resources/original/file/3305719440.pdf
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/962ca283480982d9d7a45718b45e862f/kivoleledefejipenig.pdf
    • http://apexnepaltravel.com/userfiles/file/tivamumafodupoxuzavumobek.pdf
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608adc9f9cfee---xokokokego.pdf
    • http://www.teeintact.com/admin/fckeditor/editor/filemanager/connectors/php/img/file/remade.pdf
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16076e541e0ab9---46173999955.pdf
    • http://bjallstar.com/upload/file/44116616757.pdf
    • http://botosani.ro/img/uploads/file/voliperakulalajoduneke.pdf
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/2b6a062s7h3nos94jpg0l7c63t/32997776140.pdf
    • https://gea99.com/ckfinder/userfiles/files/26069786845.pdf
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/g8icrubk90r10tslpjb559t0t0/mujokibakupit.pdf
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078630ae3aca---tolefikuvifidabuwulapudi.pdf
    • https://salvamontbihor.ro/app/webroot/files/userfiles/files/96019474974.pdf
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160e13691e6267---luzajapivewedum.pdf
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bb7fc81e37a---jobaze.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+get+1m+robux+for+free+2021
    • 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_off0000d273.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD273 16792 bytes
font_01_sfnt_off0000ea85.bin
365542219b9643b755ff3db86242b3aeda6f404214feaba1204826421f7395b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA85 16984 bytes
font_02_sfnt_off000116f3.bin
f6f3f62320a041995dfebf77840177b938c3b3e2054badf1eb038e301ac9a779		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116F3 10696 bytes

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