Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec43cd2bc191024e…

MALICIOUS

PDF

90.4 KB Created: 2021-07-04 02:48:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ecb4a29855ec67a6d4142b5cab8eb39f SHA-1: e60fd2bc6e28af61737e0116009999954c979fbe SHA-256: ec43cd2bc191024ec8149f718032b93d02823d8f55fce677a666ff96c6053e0b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and numerous links pointing to compromised websites and disposable hosting, suggesting it is part of a phishing or malware distribution campaign. The embedded JavaScript likely facilitates the download or execution of a secondary payload. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://archism.ru/uplcv?utm_term=katie+hill+nude+uncensored
    • http://papaicountrylodge-longstay.com/user_img/files/jevadam.pdf
    • http://jeansresource.com/js/ckfinder/userfiles/files/xabuvipefuvug.pdf
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1287f019b---37385762904.pdf
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2039cca55---30501766834.pdf
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d881c74046f---27928089683.pdf
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16072025b92ac1---dinoxifipeg.pdf
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160abd63ed839b---2653156109.pdf
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc40e8602e---zabefobusafuzawusena.pdf
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608556a13df5b---80301177934.pdf
    • http://westmoorclassof1965.com/clients/5/52/52ec68f2b927accf75267cb07bfcc891/File/liwiwoxokopufaxud.pdf
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/vdjg98jqf1758i1m5i964qrt01/29867295002.pdf
    • http://www.bash.cl/media/file/liwujefegiruvulezevix.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160969ca127042---tirevigawepixinumos.pdf
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/106e3472618c3d7623689109b638a26e/dowuxuletokagavosus.pdf
    • https://lifecareproduct.in/ckfinder/userfiles/files/xasapi.pdf
    • http://alarcon-v.com/editor_upload_image/file/palolobedetodirudera.pdf
    • http://ankamet.com/userfiles/file/54727096794.pdf
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/s0k7cbf7i6l723igu0v2a358el/jumakisonizoli.pdf
    • https://a2designbg.com/userfiles/file/72128996246.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/v89mpd9lj91m2uhleah7t3u3d7/8307349517.pdf
    • http://eviljoy.com/UserFiles/File/zozavupunuwaf.pdf
    • https://biogenetixpharma.com/ci/userfiles/files/26185784691.pdf
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160a5defb7701d---89204330265.pdf
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/3m2eu58kvcbe95gmrogtmj0b0u/58582734998.pdf
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/040364abcce3984535bba2a302bfe8df/zukeviwigelawi.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_off0000fbd7.bin
728c0860f23df820623f3ec5acc26a5b49f0399ac010324ad5ffce9d5faa23ee
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD7 10560 bytes
font_01_sfnt_off000113d0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x113D0 16792 bytes
font_02_sfnt_off00012be2.bin
1f20a2f1ec0a41dad3a42934e2a9632c337d0c1ead0345026a12ab5564cafbd7
pdf-font-stream PDF embedded font (sfnt) at offset 0x12BE2 17868 bytes