Malicious PDF — malware analysis report

Static analysis result for SHA-256 db0eaa1609ab6465…

MALICIOUS

PDF

77.3 KB Created: 2021-06-27 02:15:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c3d850e732c0b7a7b7d8566a8cd9c727 SHA-1: a0c70b1ad7090be129ff4f5f3b801a314ac752b9 SHA-256: db0eaa1609ab6465dd4e2d62b255a5b3a71c0155c778703524d9b8827eb2da1f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://catamma.ru/uplcv?utm_term=blue+cheese+canapes
    • http://lasfyy.com/uploadfile/file/20210620120116784.pdf
    • http://timebank.ru/sites/default/files/photos/pagefile/64782699850.pdf
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/0d4af0af8cfd862aa35f8f50917d7aa1/menobiso.pdf
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609838241ce90---pejiwu.pdf
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160850df0f322a---61943760209.pdf
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/6n5ah4dk2gmtvgqe10j4s8tvin/febepexilavijiwubew.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b4b9e3312c2---33482446480.pdf
    • https://praward.tw/wp-content/plugins/super-forms/uploads/php/files/20529c894d38a4754a1b050d32ab9b84/dukunepegi.pdf
    • https://samyenngochoang.com/wp-content/plugins/super-forms/uploads/php/files/kmpc3al548pr0qkf0c5dsk8p7k/jizazoperogaxitu.pdf
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094504a1c4be---86185927503.pdf
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c27ef0ca88f---10853309123.pdf
    • https://bonafideonline.com.ar/wp-content/plugins/super-forms/uploads/php/files/9f797021b4c5d7c821f9c801841ac7e4/lolagade.pdf
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a39b0c54b49---tenusuvojumubedemub.pdf
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16086ec44350f7---59665229235.pdf
    • https://detectiveoffice.net/userfiles/file/wuloda.pdf
    • http://nicenpos.com/userData/board/file/seketatifakunokiruvonas.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160abb6676fa54---29992836694.pdf
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c03dd6987db---69744339421.pdf
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/921fr50gnvtn4j4c02k73pb80q/sudapejebogadijixi.pdf
    • http://ylgems.com/file_media/file_image/file/xekuxon.pdf
    • https://avenue102.com/uploads/file/53968495005.pdf
    • https://aimhc.com/userfiles/file/84649662955.pdf
    • http://dansecyr.ca/pdf/file/65196192415.pdf
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16076ac8b12fab---80245310979.pdf
    • 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_off0000cc58.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCC58 16792 bytes
font_01_sfnt_off0000e46f.bin
d1c48329637809eb563e554df53cdf09b452b2d024ca1ecbaf55948fe82b4b57
pdf-font-stream PDF embedded font (sfnt) at offset 0xE46F 10216 bytes
font_02_sfnt_off0000fb50.bin
c569c236b9791043d9efb28d50bf95c9aa1d8aa52406cb3ff4ffbe5a1b9963f0
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB50 17032 bytes