Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eeabcb64a63a10f…

MALICIOUS

PDF

74.7 KB Created: 2021-06-28 15:56:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 512891f162b7ff0d73088a95d2e09532 SHA-1: e004f182e2b4b971951c5f643ecd082eacbd1499 SHA-256: 3eeabcb64a63a10f14740e9826914eb03567bb7206177889628595d9a619c53c
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous URLs pointing to compromised websites, specifically WordPress upload directories. The presence of multiple links on disposable hosting and the use of 'utm_term' parameters suggest an attempt to lure users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://chnli.tw/CKEdit/upload/files/pepibimodomimaxepoboranog.pdf In PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d243fa21ba2---9294580490.pdfIn PDF document text
    • http://valeneighbors.com/userimages/ledurepuf.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/63e4338270f5a37c992143704e0da398/43535023919.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/wironuladeliz.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160983f4a6959e---8088658811.pdfIn PDF document text
    • https://defrokatilai.lt/images/files/woxufexefowenivemoxa.pdfIn PDF document text
    • http://carefirstwalkathon.com/clients/8/89/89514deb4c0e8807eb046cac28c4977f/File/wukiwunogotarekurazas.pdfIn PDF document text
    • http://americandeliorder.com/uploads/files/64876272067.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160ccff6bda241---vukuk.pdfIn PDF document text
    • http://allasclub.com/campannas/file/88389031346.pdfIn PDF document text
    • http://tlxzkj.com/uploads/file/220745287165.pdfIn PDF document text
    • http://brickchamber.com/ckfinder/userfiles/files/60408038812.pdfIn PDF document text
    • http://computerdoki.hu/user/file/ziwutilowibuf.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c486e81d649---87359321244.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a52d2be8eb4---83005371329.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160b141b30a80d---zikodizamigomi.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/79818604538.pdfIn PDF document text
    • https://meesens.be/KrMee/Tekstverwerker/jafem.pdfIn PDF document text
    • http://vienkiemis.lt/app/webroot/uploads/userfiles/files/90203735917.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/b164bmld9u0pc5hu5qpehcvj1c/10721301842.pdfIn PDF document text
    • https://lawina-radom.pl/files/file/renilo.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2f1f71a8f---27262173599.pdfIn PDF document text
    • https://cr2tek.com/userfiles/Proj_Name//files/6333638767.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=crossword+clue+whinnyPDF 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_off0000c1bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d9d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D3 10540 bytes
SHA-256: fe3d38a379f26e6dfb5482bb7fb67deef53aa9ed448786a8e70c8632fcdada3b
font_02_sfnt_off0000f1cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CF 16820 bytes
SHA-256: c10f620ebcee20b4ce7c5a2a014d0644d859bb1e03148c39b98c5916ae1f5aef