Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b7f6d94b1b951b7…

MALICIOUS

PDF

73.5 KB Created: 2021-09-09 06:47:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d09fb6cd99a1fca5173566c7879e03ef SHA-1: 716943cee464b4cf478d9b012ba9ca3bfbfb3380 SHA-256: 2b7f6d94b1b951b76f65b7925e0e4f25295c4da052b5d0b62035045dd7e96c98
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a secondary payload or phish for information. The presence of embedded JavaScript (T1059.007) and the overall structure point towards a phishing or malware distribution campaign, consistent with Spearphishing Attachment (T1566.001).

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ahknchem.com/upload/files/40974185607.pdf In PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/7ad66f9e9acb49c441c9415f3ca3046f/kedupewiwasivusi.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612f345171e1b---42594641271.pdfIn PDF document text
    • https://cnc-ar.ro/files/file/woletegoxogotakunuwefofof.pdfIn PDF document text
    • http://anapharmata.hu/ckfinder/core/connector/php/files/bububojofovus.pdfIn PDF document text
    • http://portakalweb.net/home/portakal/public_html/ckfinder/userfiles/files/19173888596.pdfIn PDF document text
    • http://asztalosweb.hu/userfiles/file/kanibijizinenipiso.pdfIn PDF document text
    • http://immobilieninvestors.org/userfiles/file/22637170130.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/161336a954e271---dazojawejit.pdfIn PDF document text
    • https://vmwarts.com/ecovic/file/49902042407.pdfIn PDF document text
    • https://lesura.net/userfiles/file/fovesilivem.pdfIn PDF document text
    • http://skyrunarser.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210901110629240016u2w083.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1612ece51543be---41086353321.pdfIn PDF document text
    • http://akiisushi.com/uploads/files/zugerifejitelusoteb.pdfIn PDF document text
    • http://qwerty.pl/_data/file/65554932374.pdfIn PDF document text
    • http://186086.com/upload/files/fexer.pdfIn PDF document text
    • https://natyabio.com/uploadfiles/detomazuwozupesug.pdfIn PDF document text
    • http://churchontherockuk.org/home/churchontherock1/public_html/userfiles/files/doweviluwidukod.pdfIn PDF document text
    • http://pvvc.cz/files/gevulodokudorazokemedef.pdfIn PDF document text
    • http://miyagi.chi-kara.net/Upload/files/tubakanoziralufogivem.pdfIn PDF document text
    • http://fourfoods.com/images/files/newofivurovizowuj.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/d88h8brakfvpda7mucj3epbpo8/29090982349.pdfIn PDF document text
    • http://www.taylormadetc.com/siteadmin/ckfinder/userfiles/files/vogolepam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=download+para+celular+samsungPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC12 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD424 16188 bytes
SHA-256: 0e7b30d2ed5b6cb6dcd8830495b46a01707a8878f3a42e33a3935f2cfeb37334
font_02_sfnt_off0000fdda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDA 10852 bytes
SHA-256: cf4a44517ece0786dc0ac1dc2ee4014b44d17c26a35513552920dd7810d9e37d

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