Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ad1ca6080333dfc…

MALICIOUS

PDF

92.3 KB Created: 2021-08-30 16:14:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5a68de55227713aa64ea478387c5fced SHA-1: be53bd51e0462aae60f9832182147dd3af456ae1 SHA-256: 4ad1ca6080333dfc668a05ec08bc70cfc6ee2fd858e4d6f142ab53f30e8f227b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://cructi.ru/uplcv?utm_term=how+to+start+a+startup+with+no+money PDF link annotation
    • http://alexandersorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/98226930219.pdfIn PDF document text
    • http://naoshima-habitant.com/images/blog/file/74458324774.pdfIn PDF document text
    • http://singer-island-condos.com/userfiles/files/vowiserudem.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/87df815523cbf6eaa1a4885719035900/kizomometosepovuxalo.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7fcc7e3cf---4827795079.pdfIn PDF document text
    • https://cvzona.lt/resources/img/files/69929247509.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160ccad82b6c2f---40846423288.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/2ae16599a5ae4bbaf2a7dd43ef6e3fab/zezuxakegexalupazukoxig.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c52fda561e4---pigalulibivan.pdfIn PDF document text
    • http://renovator.cz/files/file/zaditivowigutitededu.pdfIn PDF document text
    • http://infunplastic.com/d/files/ratagaxi.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/de6580d9295e93419b1c7560b0048cbd/xovofozevepekukina.pdfIn PDF document text
    • https://equinox-e.com/upload/files/silugexusen.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/353013d46477c3ef00c1810c56f30905/89325653198.pdfIn PDF document text
    • https://client-sms.com/ckfinder/userfiles/files/15783577053.pdfIn PDF document text
    • http://th-hl.com///upload/files/xarolifiwubeperurepefo.pdfIn PDF document text
    • http://huimao.com/upload/wobusefilutowu.pdfIn PDF document text
    • https://santchavarabed.in/ckfinder/userfiles/files/xerurubutafoji.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097ff9e44b8f---puzevibanarodatuj.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/poxejevunomekale.pdfIn PDF document text
    • https://valeaflorilor.ro/img/uploads/file/42749486960.pdfIn PDF document text
    • https://defaico.com/d/files/49938174045.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001023e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023E 10760 bytes
SHA-256: ffdbb731f3ac2eb3cad6408b17ef95ae602728df9a0ed659a55207f43fdf3c8c
font_01_sfnt_off00011ad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD9 18484 bytes
SHA-256: 193a02b264c9ba803821f03226497a890ea9b60ca3fc4b35bebca884e34677a3
font_02_sfnt_off00014ab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AB2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.