Malicious PDF — malware analysis report

Static analysis result for SHA-256 79c0e30c696875cd…

MALICIOUS

PDF

84.4 KB Created: 2021-07-14 06:36:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 15d5421e812e4bf8357bf9d69067612c SHA-1: 7ed70c87cc8e782dbd595000c4f3ae99c29235c2 SHA-256: 79c0e30c696875cdd403f3408ff282921a12a9bd68800882ef4d3b71278aead4
164 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier returned a high probability of maliciousness. It contains numerous links, many pointing to compromised WordPress upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate an attempt to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://mn-lawfirm.com/box/userfiles/file/fusabugigirojizuwexujasub.pdf In PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/5hhmtkkti7nlgttjcsqgd5ni35/jabozefobije.pdfIn PDF document text
    • https://thechoose.it/file/6467482189.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/294087bd63c8afa096b6f62ee95d252a/kuninubipu.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607b37a3da615---kivumijawolo.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/pojigekaruw.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/b3i17jf6oto96smb9506jml9pr/gukimibovigi.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e4cf511ad---fuzezenubanezowolofugi.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160736d2aeb07c---vikobodedarolobawal.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/9subp052pcm4om3nf456gvbs24/60607451326.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/d5de6f1a7b6c3ecf291814938c6b2ad6/9588349022.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/accdf0e66d5eeb3cdc7aafddadcdcc8e/61820359104.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/a7dd772e4a823f8898da06ebdd3dac99/35800419147.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160742fe6356e6---99577003584.pdfIn PDF document text
    • http://sattamatkapatti.com/userfiles/file/69720175353.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/boqdldgqgo01mhsombsd8253i0/83098474157.pdfIn PDF document text
    • http://equipociclistaugeraga.com/ciclistas/userfiles/file/95543169611.pdfIn PDF document text
    • http://mindentudor.hu/userfiles/file/tuvokarezopezojubedebezu.pdfIn PDF document text
    • https://kozhikodedeaf.org/admin/my_files/file/95218879486.pdfIn PDF document text
    • http://csc0311.com/userfiles/file/20210629054214_bing6y.pdfIn PDF document text
    • https://varbackaforskola.se/ckfinder/userfiles/files/30648913334.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/f9c0bc701e653014307303b8580dd5ea/nozudabizebexavumixuru.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a258ed28db4---korijosisitowimida.pdfIn PDF document text
    • http://mastervgtour.by/var/upload/file/jagesafasajaji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=grade+9+english+worksheets+with+answersPDF 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_off0000e7cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CC 10912 bytes
SHA-256: d03cde89bec0ab819baca45b17d377d8d28614fb812048f46a4849da527a00de
font_01_sfnt_off000100e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000118f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F6 16980 bytes
SHA-256: 741dcb6addfa97732306fd9aee13948ed43ddc1a8e325eeae8f3984ed6563cd7