Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad42a3467837c7b5…

MALICIOUS

PDF

89.6 KB Created: 2021-09-20 02:50:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c61ca37272d47b61506092607faaedab SHA-1: b1916d04dcf945f5d16a5623b20c05995af46fee SHA-256: ad42a3467837c7b51ba645a6af5e11524603bdfa9e3e9e503bfdf6e0e426ff2b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://pistant.ru/uplcv?utm_term=ps+i+love+you+pdf+download PDF link annotation
    • https://chataigne-cevennes.fr/imgs/files/rujax.pdfIn PDF document text
    • http://mkpstroitel.ru/upload/files/53895364676.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/161457fc65cc26---26219593213.pdfIn PDF document text
    • https://impactmediaresources.com/userfiles/file/mumuve.pdfIn PDF document text
    • http://ambartakip.net/belgeler/file/26732822541.pdfIn PDF document text
    • http://lex-ter.ru/admin/ckfinder/userfiles/files/6460186673.pdfIn PDF document text
    • https://nirmalujjwal.com/public/ckfinder/userfiles/files/simaganufajopereseg.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/161408f40da4a1---30489876705.pdfIn PDF document text
    • https://cahayaapi1.com/contents/files/piboz.pdfIn PDF document text
    • http://exosportsante.fr/ckfinder/userfiles/files/jemigajukezip.pdfIn PDF document text
    • https://xpress2.eu/ckfinder/userfiles/files/gufidudato.pdfIn PDF document text
    • http://metafelix.it/userfiles/files/77753299103.pdfIn PDF document text
    • https://praktijk-fix.nl/userfiles/image/file/xudovizoj.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/7du3gapi1bjktm5hq0qctmsb5q/14161373879.pdfIn PDF document text
    • http://humansharehouse.com/userData/board/file/5093143290.pdfIn PDF document text
    • https://searches.onlineconvey.com/userfiles/file/ripufegomafuvegeba.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/16140eb74c8c62---81691050007.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/16140a75ece22b---76819855889.pdfIn PDF document text
    • http://cozycornerexpress.com/uploads/files/20594456940.pdfIn PDF document text
    • https://dom4m.lv/userfiles/files/38282423573.pdfIn PDF document text
    • http://decaldankinh.net/upload/files/pelakipuwejiraxozajujuzi.pdfIn PDF document text
    • http://konberdbio.com/upload/files/77341288228.pdfIn PDF document text
    • http://gavinlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/79456138624.pdfIn PDF document text
    • http://cozycornerexpress.com/uploads/files/17996728950.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_off0000f874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF874 10660 bytes
SHA-256: 20f22e541ff3ccf5395273eeb55f6d36606847af441c41893ad16314b22a50db
font_01_sfnt_off0001110e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1110E 18668 bytes
SHA-256: 1753af3ae761fad4c142979f74feb8b1292494fe42b734daf5b3e705e9994ea3
font_02_sfnt_off00014103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14103 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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