Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6e6da6d9dce9c9d…

MALICIOUS

PDF

83.8 KB Created: 2021-06-28 13:33:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e4e504d19bef4de8688937f103e12666 SHA-1: dc895cf2b9755370ee20bf2f0cdd1be6a790643b SHA-256: c6e6da6d9dce9c9dea4010e816599ce1bf2fb040bf9e2fe852dddd7c0feab0c9
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, indicating an attempt to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/e07f2daa4e9924ff3b709ae41e5af533/geratoruk.pdf
    • http://chothuexehochiminh.com/userfiles/file/durufuxipaxixesunid.pdf
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/k3hui0n17jv98cifa4lr91hti4/rukexa.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160713edc45e4b---rarokeditop.pdf
    • http://fbchitchcock.org/clients/8/8b/8bdff38a390027835eb24981312b950c/File/fivuwi.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/113cab28e0013ed28c37784139b7c999/99034755137.pdf
    • https://wemservice.com/ckfinder/userfiles/files/64724124721.pdf
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/edc71ad4a56b165b0fa55de0c914f2ec/xezeguwarosobaxanelosajo.pdf
    • http://www.ecvbrass.ch/user/web/file/35361342157.pdf
    • http://sbsinternationalschool.org/sbsisnew/userfiles/file/36043165490.pdf
    • http://irinaburmistrova.ru/files/68143338744.pdf
    • https://rosycaffe.com/file/vuzudamogezepiwezu.pdf
    • http://broadgatecapital.com/userfiles/file/zufabazigubapuzizano.pdf
    • http://expertsystemgroup.com/file_media/file_image/file/33412004915.pdf
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606f18583fc34---81719581343.pdf
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609905816fc43---melar.pdf
    • https://studiorampinelli.com/file/tujogozurasejejikimakuwo.pdf
    • http://rheumatology.institute/upload/content/file/41563220681.pdf
    • https://alice-immo.com/userfiles/file/witokosejeb.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/16076eddccf667---zowetonesibexupaxekan.pdf
    • http://alimentosldm.com/userfiles/file/lekeroluberixunuresuke.pdf
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160866c3a69aec---49304829875.pdf
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/746505bf4805c630b8cac1e11b78ed11/fevowatimox.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=what+is+moral+considerability
    • 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_off0000e5f7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F7 16792 bytes
font_01_sfnt_off0000fe0e.bin
64957d1d4b4d7b44c21bcf08c50a657fa5ef77cc34fb730bcb130b03bda63be5
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0E 10884 bytes
font_02_sfnt_off00011710.bin
8f223d269ee6b8dc36da7ffe23772ca7715170b74f01616165cf1dfcaa485e95
pdf-font-stream PDF embedded font (sfnt) at offset 0x11710 16604 bytes