Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc7be61b94cc818f…

MALICIOUS

PDF

95.3 KB Created: 2021-08-01 20:08:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: f8a6c5473c2e05c6d7a6d99d9a881d5e SHA-1: db9ac2b470f3ab70e9c80630bf7ae9a586177671 SHA-256: fc7be61b94cc818ff7a2e1e979614ccb84db250b7378f2b9cc40808018386b98
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs that point to compromised WordPress sites and other disposable hosting, forming a link farm. These links likely lead to further malicious content or phishing pages, indicating a phishing or malware distribution campaign. No scripts were extracted, but the structure and embedded URLs strongly suggest a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef6f74407e---boxuwononajawekovu.pdf In PDF document text
    • http://bantinnhadat.com/users/files/26123802413.pdfIn PDF document text
    • http://johnmichaelharrisonlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dunovawirarigaji.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/joleribemovat.pdfIn PDF document text
    • http://thsport.dk/ckfinder/userfiles/files/kavede.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/d395b303d9a67e1364388835a9595453/jegisakotefivafarag.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/8bc85aa208eefbd356afbb65b7645314/xibavazogadorasewimapev.pdfIn PDF document text
    • http://fobosgrunt.ru/files/ckfinder/files/banukunulumuwuwula.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/8ma1luijme4cq1ljnlo42ehtlp/mugegugotukafefevu.pdfIn PDF document text
    • http://interiorconsignments.com/media/file/31733462953.pdfIn PDF document text
    • http://mgocsm.in/userfiles/file/76890635986.pdfIn PDF document text
    • http://austria-ex.com/images/blog//file/12966083956.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/80b75123c8dd179dfba85074b0ca4751/wuborage.pdfIn PDF document text
    • http://cwesp.biz/upload/file/vefexiwivawinebagise.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160705d53a2e0e---bojubinoxif.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16077dc79600e4---pudasupuzozipotumil.pdfIn PDF document text
    • http://csc0351.com/userfiles/file/20210703021815_9bazgc.pdfIn PDF document text
    • http://lyzjkgm.com/d/files/zaxix.pdfIn PDF document text
    • http://kingalbertltd.com/uploadedfiles/file/95172370364.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/6c3696cdf426bef72f35b46762740ce1/gewuxofawadodogepo.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160feee8f9ffe7---pitulufima.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=clash+of+lights+s2+update+apk+download+for+android+th+12PDF 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_off0001081e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12035 11260 bytes
SHA-256: 256bfbdf39ceb07c0602c4fd1c7bbcedf26a2c4bfd3b55b94b7799f96d2bb749
font_02_sfnt_off00013a8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A8A 21316 bytes
SHA-256: da9bbd708e93fd57db0e0da0c1fb8d81e9e9906b0573c0e1e5a986d1f2e60ba6

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