Malicious PDF — malware analysis report

Static analysis result for SHA-256 290f56acf274280f…

MALICIOUS

PDF

78.9 KB Created: 2021-09-02 11:56:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9db64dd77f7ad256d7e7f691e8760249 SHA-1: 63b5d533f31742d4f3c35b9a20fdef09b7749297 SHA-256: 290f56acf274280f7d6eaf9358b9c346134e4322cd27f3c8936ad5d2446266ab
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution intent. It contains numerous external links, many pointing to compromised WordPress sites, suggesting it functions as a link farm to redirect users to malicious content. No scripts were extracted, but the PDF structure and URL patterns strongly indicate a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://wastran.ru/uplcv?utm_term=aspiracion+liquido+amniotico+meconial+pdf PDF link annotation
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16070b9cc4ce38---28953765746.pdfIn PDF document text
    • https://diedacorporation.net/freesiafiles/file/3908108355.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/455ef64f4e8cbb3818cfcaa657130c54/95733726781.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///bujeluk.pdfIn PDF document text
    • https://sayurhijau.com/contents//files/dulizaguki.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160974d8001776---16058226666.pdfIn PDF document text
    • http://vrieshorst.nl/images/uploads/file/29449816404.pdfIn PDF document text
    • https://signika.pl/Upload/file/78653442690.pdfIn PDF document text
    • https://parfumzone.ro/files/file/wimetovegozaxoxolovanovaz.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-5-12/20210512025107270218.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c03b82ad03---gisosefexikenagefukadi.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983ee6561dd---35497097276.pdfIn PDF document text
    • https://parlagame.com/calisma2/files/uploads/56817582678.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a022e71d18e---66930744529.pdfIn PDF document text
    • http://myflora888.com/ck_files/files/sopolubegowokosutiz.pdfIn PDF document text
    • https://vinniescustoms.com/userfiles/files/zusovatug.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/e2361460770c90953cca1291009b6745/zivujagumipakinuxapa.pdfIn PDF document text
    • http://bomtvcloud.com/data/board/file/20210513003352.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160abdb14029b1---ritigibomejorokoni.pdfIn PDF document text
    • http://tbvshungviet.com/upload/files/tutemilubo.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16110e19d7346a---wajaxonasivege.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/ef3c33c7fe46de9f2e5dc8f54a7f7b42/gavenidake.pdfIn PDF document text
    • http://smsalumni1971.com/apadmin/uploads/userfiles/files/62142368386.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/8gq8u26iph02ora5lalt01pbth/mevasajikikofubududosen.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC5F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE476 11008 bytes
SHA-256: 93b77eb5d91db89278c000647c1516fd7c1a3c3d1f650574fb1f56abe80a2e16
font_02_sfnt_off0000fdda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDA 18476 bytes
SHA-256: 807cbca7b476b378f1f0fa31ff2bc4766d50ed67ab0a46852d31aca73b475611

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