Malicious PDF — malware analysis report

Static analysis result for SHA-256 9347ad8ccecbb2ea…

MALICIOUS

PDF

78.0 KB Created: 2021-07-08 01:49:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e6ded58271bbce3e5533ca8a71f72af5 SHA-1: 462633e0b9d05065f731025a26af403d0f63bd1d SHA-256: 9347ad8ccecbb2ea238f6233db150fa213aafa7d60e90f4b98f929ea86994a20
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites, including WordPress upload storage. The primary purpose appears to be directing users to external resources, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://raisemoneyonline.org/clients/6/69/691275cf9a36cab982b2498ebdc715be/File/pitekubafodiv.pdf In PDF document text
    • https://immobilgold.com/file/nufojigusivegutafe.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/j52vtqja2u079njeeerg695548/vopufujiduxijire.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/a6a7b2438c9308374ea2ca117ec5ac96/38836164559.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/33617282654.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607e54c660849---lovifabajafuvefofexe.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/m50utlki59h75ri5kunokvps7u/55662869235.pdfIn PDF document text
    • http://happinessgown.com/upload/users/files/wozafawiwasagi.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a12c919cd72---siwoxagudosodonop.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1609541a032ccd---riwomerotojobutuxusitabeb.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/gn4d7aad2nk78md1gd921d0bp7/darexebupug.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5eae7369b---61499462984.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/njfupdvebt3u65hc6tmne4jf6a/fetej.pdfIn PDF document text
    • https://digireg.dk/upload/xokazotis.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/70167246640.pdfIn PDF document text
    • http://diamantina-joaillerie.com/ckfinder/userfiles/files/91013824639.pdfIn PDF document text
    • http://starlightcelebre.com/clients/4/43/43e9139217482d7666ce300faf566241/File/viladepepusuto.pdfIn PDF document text
    • https://on-call-anatomist.org/ckfinder/userfiles/files/putulotofapedugatebut.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c97bfb18d9---xofiforotozefoneno.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/43213765980.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/709d3d8aad84c445414b8231807389d7/vivuzitulupavuweziba.pdfIn PDF document text
    • https://diaochue.vn/userfiles/file/89907270505.pdfIn PDF document text
    • http://iwishop.hu/file/leregasadadokomi.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d139097e25---35699814895.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=how+to+measure+diameter+of+irregular+shapesPDF 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_off0000cd6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD6A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE581 11016 bytes
SHA-256: 529d8614a807202de449ad48bbc00485f9c2c65cbaac79ee7ccf41498228788d
font_02_sfnt_off0000fee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE4 16856 bytes
SHA-256: f609225245d012cba07b799aff2438a4882d57d560ed8b1a5f9699de4d441eca