Malicious PDF — malware analysis report

Static analysis result for SHA-256 80254f797a5f84bc…

MALICIOUS

PDF

73.8 KB Created: 2021-09-28 05:34:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ae44feab25c1e4b05d9c36fc7c0238be SHA-1: 8d27caac68e268197da1d0c121e25e71e9d01d95 SHA-256: 80254f797a5f84bcb9229bac00203e50d4b16690db00146d03ff5f010f2b21dc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://inwebjor.ru/uplcv?utm_term=remove+pin+code+android+without+factory+reset PDF link annotation
    • https://amd-export.com/site/upload/file/35599325127.pdfIn PDF document text
    • http://qhchemicalsfeed.com/upload/files/vobevi.pdfIn PDF document text
    • https://bazk.info/public_htmluploads/file/ketujudirofoxis.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/161423ecf0dcf4---91960960685.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/tnrk6tf64rvvgoce13aa2f42a6/56882121425.pdfIn PDF document text
    • https://infiniteprospects.com/FCKeditor/file/66591371620.pdfIn PDF document text
    • http://studiobaliva.eu/userfiles/files/39309228584.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16136d4a3602ae---mawav.pdfIn PDF document text
    • http://gowowdeli.com/uploads/files/94380709140.pdfIn PDF document text
    • https://xn----7sbbg1ddpkdc.xn--j1amh/uploads/files/13768062487.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149933e36466---bonipizurafugirosoz.pdfIn PDF document text
    • http://a-aqua.fr/ressource/site-image/files/xerujosulusigejumasiz.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16146cc9bb5ce9---66400866124.pdfIn PDF document text
    • http://eclickapps.in/userfiles/files/9619533288.pdfIn PDF document text
    • http://vagtteam.com/userfiles/Files/wufujikilunikemel.pdfIn PDF document text
    • http://netichikawaya.com/userfiles/file/zawegunosiwomijulodefa.pdfIn PDF document text
    • http://kimsanghun.com/upload/userfiles/file/20219261549143984.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16136b37aa24ce---zamovodejakajotafog.pdfIn PDF document text
    • https://aletihad-group.com/userfiles/files/tagixiveno.pdfIn PDF document text
    • http://tortsurprise.ru/upload/redactor/files/64144313861.pdfIn PDF document text
    • http://asbu.net/uploads/FCK_files/file/73059570093.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614102542bce1---xofodalomapoja.pdfIn PDF document text
    • http://officeharbor.com/pdtInfo/zokajugenevowizanawoj.pdfIn PDF document text
    • http://phutungtdc.com/upload/files/19646239715.pdfIn PDF document text
    • http://djarkitek.com/temp/vinney/HTML/userfiles/file/55338383997.pdfIn PDF document text
    • https://nhaccugiare24h.com/uploads/userfiles/file/tuwukurotederotagax.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_off0000ba32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA32 17756 bytes
SHA-256: e10b8f21535bebc4e8e295c47452d28d2dae328004dc56cd9843cf4bcff748e0
font_01_sfnt_off0000e6f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F5 11248 bytes
SHA-256: b0d6b2cc1e8c5cc60823f8261150d101c57c33a6658104a4a5bdfd43c803d5bd
font_02_sfnt_off0001013c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1013C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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