Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dfb39d3466c5ff1…

MALICIOUS

PDF

89.4 KB Created: 2021-06-27 04:32:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6475cbadff7a4d1c556c823486326cb7 SHA-1: f22057eec8fdd119acecf3bd50392b6203ef4334 SHA-256: 2dfb39d3466c5ff18d613bc056f13af4bb7de642dde865a25e00d80f8b58f533
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to various websites, many of which appear to be compromised WordPress installations hosting PDF files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. While no scripts were directly extracted, the PDF structure and URL patterns suggest an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9765

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://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/780a22d1b91de8d0898245c7fe320599/207225321.pdf
    • http://acpiindia.com/userfiles/file/dodakolabidegerasekuli.pdf
    • http://kulturazebrak.cz/userfiles/reburudoxotu.pdf
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/27989fb5df5dab74dd866fbee5f768a3/sirimobapejolugoforaxur.pdf
    • https://arab-hams.com/Ups/files/sukojunugufadegure.pdf
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609661e6493c2---39631282167.pdf
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/83c1427dc394ab83256479f629f21e09/62622105160.pdf
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/f52f7b2387243d20c991ccf317f41bde/vubudedogarixosazin.pdf
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb76b71d96---6077157545.pdf
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/b83f18c6f73ca0c01ba6af1085d22392/nurot.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2e1db9355a.pdf
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/tkf6udmalng67cgd0um49h5ap6/jabomiwosuwevotigojejiku.pdf
    • http://thebeautyofdesign.nl/ckfinder/userfiles/files/pikogejawinuvuluwovimunak.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a34c1a10cd8---jagubedikebu.pdf
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/e1ef141422cd6cc14104b64426c506e6/44808283868.pdf
    • http://www.vegagastro.pl/upload/file/42172968423.pdf
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/b32c48fbbb76eca7004a000f641a2cef/sulasofuxadaje.pdf
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/b96db9b2c3a2f2c139f234ed8a8d52ca/safavabexuzijuzedon.pdf
    • https://aashianarealty.com/file/1074305995.pdf
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/u5o1bb8pued9jk0qtc1qadsr27/9285026873.pdf
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/16071eb0de0194---25369765178.pdf
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/b6c730ae7d8ce281dfcbf7de24ff3e96/butufabebopokopawuge.pdf
    • http://angeladaniel.eu/uploads/files/89260656034.pdf
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/d73900f45512fade20adbc85bd23d46f/86274888574.pdf
    • http://orgue-chantepie.info/FCKeditor/upload/file/livanogedodavimopijo.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c45310f23ef---53761494296.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=unforgettable+french+mp3+download+320kbps
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d888.bin
456e02383dfa85774fe96f0984142deaad3e54d3923a51fade66da1d695d85bb
pdf-font-stream PDF embedded font (sfnt) at offset 0xD888 11716 bytes
font_01_sfnt_off0000f40e.bin
3ded9aaca2ef9e6c6e95cee9882111b9cda0db582afcb602817e0619031ab472
pdf-font-stream PDF embedded font (sfnt) at offset 0xF40E 18776 bytes
font_02_sfnt_off000111f8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x111F8 16792 bytes
font_03_sfnt_off00012a0a.bin
9877bb66190824d3c697ffe4efcdd2b2ef023f581ffc01ba4adbb89f838fbc2f
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A0A 16712 bytes