Malicious PDF — malware analysis report

Static analysis result for SHA-256 46feb6a2936ef378…

MALICIOUS

PDF

85.9 KB Created: 2021-07-04 08:05:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: b167014ae6e1b8b893310434a9cd6d15 SHA-1: 7408909339dc84a9becb39c12dfcebe9df566c6c SHA-256: 46feb6a2936ef378111cf0cf40ffb634951d9827f2aa374ba02f6c87b1fd518f
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised or disposable domains, indicative of a link farm designed to redirect users to malicious sites. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest this malicious intent. The ML classifier and ClamAV detection further confirm its malicious nature, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://jesssmithtri.com/jesssmith/ckfinder/userfiles/files/53368456825.pdf In PDF document text
    • http://malbreil.com/userfiles/file/81292855021.pdfIn PDF document text
    • http://tfforming.ru/d/files/takivarur.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/88641288154.pdfIn PDF document text
    • http://myphamlulanjina.com/upload/files/rizodixuwof.pdfIn PDF document text
    • http://chromowane.com/userfiles/file/gegawefujuz.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/107ea51cccbdfb46d1422768ec6b87ae/5222800541.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160863f4dbdf41---40979610862.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/9db8c36a63c089b0f56d8d9393d067fe/giziduxunawogojuli.pdfIn PDF document text
    • https://deltagroup.bg/uploads/file/33754095770.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/1f49866961b19639f047255166612c37/89421953591.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608b841cd69b0---72872472379.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160afc064849f3---36607286819.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607630c6cdd07---jafadolirupodaf.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bb1bc54d8d1---bafanipadasod.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607377bf03c76---kamewifawadiwori.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/47bqefma8f0icgvdt4mvqqrgis/dijuta.pdfIn PDF document text
    • http://savitaco.com/uploads/images/files/beponumaligoxoduzex.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/pagewegeru.pdfIn PDF document text
    • http://chinahongji.com/d/files/jufogelapunugosoxaxefuxoj.pdfIn PDF document text
    • https://taevlingar.se/images/pages/file/69902968606.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=do+you+get+paid+time+and+a+half+on+christmas+evePDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/446afc10c2100bfdcee221abab1303b9/pupunilamuvovuzigiguweb.pdfIn PDF document text
    • 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_off0000e8bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BD 11348 bytes
SHA-256: ae7d32dc8bdca6772c598fdff88d7ade0c085b362253f2c59cc77d0520fff980
font_01_sfnt_off00010315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10315 17220 bytes
SHA-256: 44ac4242869082a6d84e3843c265dface43cdbba733aedebc51c868b77f1002f
font_02_sfnt_off00013030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13030 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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