Malicious PDF — malware analysis report

Static analysis result for SHA-256 584658f405d7060c…

MALICIOUS

PDF

84.2 KB Created: 2021-06-28 23:33:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0e14d3fb4101d747e399df27e9b344d8 SHA-1: 048383c90de084bd9546deacd999e8f95da74b8e SHA-256: 584658f405d7060c7b9df5eecc142fb7f6eb436620574b46f80e0134ee9d7ff9
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised websites and disposable hosting. These links are likely intended to lead users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://ekselantechnology.solutions/ckfinder/userfiles/files/7794377767.pdf
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/bbada978093b1aef906b1d9b7cd53cde/19935230686.pdf
    • https://greenlakepaint.com/ckfinder/userfiles/files/kenafewiverevewukomafumi.pdf
    • http://lakesideterracecondo.com/clients/41361/File/98634325112.pdf
    • http://guerrazzi.info/userfiles/files/16186285997.pdf
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/69cb41772b5e11306b468456852a4ac1/bubidusisugibaxafusu.pdf
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/3281c01745e71238183806ac72cd718d/88443531562.pdf
    • http://upoart.com/ckfinder/userfiles/files/jexulijetedabixanusu.pdf
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/asa9u4a2814fp4odibnmvsq455/wibivosoxumerenubog.pdf
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/74b970d1362d98f6e1ab6aa7aa06d088/76069377809.pdf
    • http://beiks.info/public/file/89909664429.pdf
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d2604cea272---36383701039.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607070a22b96c---lerifemi.pdf
    • https://cambodiaangkorhomestay.com/userfiles/file/6016499622.pdf
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/35v9nqlr7q66tj1d0spk926io2/zapekilov.pdf
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/0de8e245c407265abf29fc906ef39aa0/2700919858.pdf
    • https://www.nexidia.it/wp-content/plugins/super-forms/uploads/php/files/f1bb8e016e428152798e14582850fd4b/12911992033.pdf
    • http://cuanhomkinhtoanthang.com/media/file/morewasutimebinonamukedu.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609875f2622a1---5994723048.pdf
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608676de3d11a---23679218213.pdf
    • https://orldoc.ch/wp-content/plugins/super-forms/uploads/php/files/amm6fr9kdo5gas8sedl9dsfk63/tivarijakititusolox.pdf
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/94f5e8edcc187f7f04e2ee9a2caa3566/66239752579.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=a+stye+on+the+inside+of+your+eyelid
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e923.bin
a6dfe31f97d5cd1f355dc2a2fe6fe90ff8ea902bf46426e16a280a52adb6daeb
pdf-font-stream PDF embedded font (sfnt) at offset 0xE923 16428 bytes
font_01_sfnt_off000113b3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x113B3 16792 bytes
font_02_sfnt_off00012bca.bin
f64ee58f196998bd6c7ca5e1d186236d306ffc40869897ffc5d8491b5f880bb1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12BCA 10484 bytes