Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d2cfa9e29f4a326…

MALICIOUS

PDF

103.2 KB Created: 2021-09-03 23:29:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ceaeda14be4de1c0492073fdfd957abd SHA-1: 2cefca711898a092694b7732511f97fdc8702aeb SHA-256: 3d2cfa9e29f4a326bad750fae90191ddf13eb53111d3cc22eb85a35da2f732f0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9867

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=rank+of+coal+pdf PDF link annotation
    • http://diversecityuk.com/userfiles/file/wasejumofo.pdfIn PDF document text
    • http://domkomplekt34.ru/attachments/file/31261475870.pdfIn PDF document text
    • https://ikitellirezistans.com/upload/files/70840160265.pdfIn PDF document text
    • http://colorsoftexas.com/ckfinder/userfiles/uploads/tesevivurivedunidu.pdfIn PDF document text
    • http://bowlinggreenhsclassof66.com/clients/b/bd/bdf8ab256cd88a603fc2b95a051c5839/File/74294647689.pdfIn PDF document text
    • http://moscowprice.com/content/xuploadimages/file/93909218669.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/12f0ae8d98b63429b63084ea8df3da1a/80977790278.pdfIn PDF document text
    • http://st-johnson.com/Uploadfiles/files/72282892270.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/vugefe.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610efdfc93f14---10988808930.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/0sriqfgtioolgun0hkv1n24a61/sesepufojakalerake.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c079453488d---21498804521.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16118f2dd76cd6---kobofifetali.pdfIn PDF document text
    • https://insinkerator.us/images/uploaded/file/34988213634.pdfIn PDF document text
    • http://sjhtractor.com/d/files/47839896766.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/fikil.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/xevofopelarejebizoxipa.pdfIn PDF document text
    • http://dblbtech.com/userfiles/file/60440092043.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611ca372bf309---pepokulapadubupejeno.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609476fc18fb6---32484697686.pdfIn PDF document text
    • https://www.pessin-location.fr/ckfinder/userfiles/files/88362723135.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/stj7ev73edu9dhmrp1d8gnu1h5/16851408230.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/50dfcdc255b6ebbf63bfc80ea64be34d/basopinewolitabarenudun.pdfIn PDF document text
    • https://yingzhaoliuart.com/upload/file/wovufafigoxaduzavofupe.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945a3816b88---wokuxesukeper.pdfIn PDF document text
    • http://ski-experience-japan.com/images/blog//file/giguxukalot.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a8862b418d6---63135434778.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_off0001347a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1347A 17028 bytes
SHA-256: 0b47e3442d56086ee2e89ac08df8235bc377c7cc6e89d1c6219389600b4a279e
font_01_sfnt_off00016031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16031 10160 bytes
SHA-256: 13270ae918f6620200daac56a39618586706753d0e6786c1fd90ea4f04d2d9ff
font_02_sfnt_off00017708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17708 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1