Malicious PDF — malware analysis report

Static analysis result for SHA-256 fada228f13bc3412…

MALICIOUS

PDF

92.4 KB Created: 2021-07-14 06:00:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c0fab410d1e2f63fca00fe265040073f SHA-1: a60be19a7772d1a3a2b4d1018ac391afddd16e83 SHA-256: fada228f13bc34124aed27c8921526f37316c053f82298b8a2e8d4832d19ede8
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to compromised WordPress sites, functioning as a link farm. These links likely lead to further malicious content or phishing pages, indicating a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ca946f37f---77522876177.pdf In PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092663ed9db4---tasogitofurukiwubojag.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/f27c5fbf12500c80c027a60eaf0d2eca/jejixuxifakuri.pdfIn PDF document text
    • http://accomplishtheimpossible.com/userfiles_ati/file/rilovumizomazoj.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/89b6e11bf8af10f4a99a85b73a5938c2/49824359065.pdfIn PDF document text
    • http://banghetretruc.com/media/ftp/file/nivakiwekanax.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/e0827a200f1d10f34ae5010c6199f0d0/wusujilonafolemuvuvulodok.pdfIn PDF document text
    • http://artanuji.ge/admin/ckeditor/ckfinder/userfiles/files/givopedugaxidilimer.pdfIn PDF document text
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/wubawelipe.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/60ecfd6e86295939fcafcbf5a23b5481/fikuvef.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8522363fc---48514201954.pdfIn PDF document text
    • https://artenika.pl/fck/file/xurutoguvelajanigi.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/s8qfthfhbf04o35e460smobc99/kezefuvudipovivuvuw.pdfIn PDF document text
    • https://jyapa.com/jhuoyue/uploadfiles/nesuzawikovopewumep.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a40c85d6998---89207451371.pdfIn PDF document text
    • http://huerural.com/uploads/image/files/wuvajaxujafitavezadu.pdfIn PDF document text
    • http://efuegypt.org/userfiles/file/54978413957.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/55009935942.pdfIn PDF document text
    • http://dancedynamicsla.com/clients/38740/File/suzosokubaxe.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608640b6dfa07---woluxazuvijoxewabare.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/80fb322e89a11a59f61a3a1a4a262572/44181215008.pdfIn PDF document text
    • https://callmarkinvestments.com/callmark/files/96858689867.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/d8afa8d224223e054c51897b93ffce9f/21537475520.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/eql0n8n5oqhfsslau2mp1aj5cr/8187350471.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/8138mh0rjuru192l2oi262nlv6/30468980801.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=trion+he+1400+manualPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B6 8312 bytes
SHA-256: 207f4d7b9765575ec4f739d910c044b84d55c67b1f80e13eb2a9c2b8f34da96b
font_01_sfnt_off00010343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10343 10424 bytes
SHA-256: 3d553638d197208564a8ac523e973716508ee38dcb13456e5f22b2e0b701f18c
font_02_sfnt_off00011aa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000132bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132BB 18632 bytes
SHA-256: fb1966eb394c1476ac0efa4d88e3b36154bf8ca1343871db9b676299596cf455