Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f2be06782769710…

MALICIOUS

PDF

91.4 KB Created: 2021-07-01 19:53:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 2ca66f38481a6f7be811242dc421ef2c SHA-1: d8d944e33a8c53a596786bf45c994c1e76ca281a SHA-256: 1f2be0678276971090fa20437ba22ab7c8525b05c41ed4afafaafe702117bfce
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the PDF structure strongly suggest it's part of a phishing or malware distribution campaign.

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://catamma.ru/uplcv?utm_term=overlay+discord+point+blank PDF link annotation
    • https://aawyx.com/sites/default/imageuser/file/52722743291.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16077d50d9e1d1---75172010904.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dde53e74f36---banuzux.pdfIn PDF document text
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/16088ea780b5dd---51668885251.pdfIn PDF document text
    • https://grupo-kayros.com/userfiles/file/satifolipog.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bb1b6c4113d---dibun.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160c66fe717b13---57691103510.pdfIn PDF document text
    • https://porterbrothersltd.com/app/webroot/uploads/14531546241.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608c0d37322b7---nopoponuxarofizimekitenut.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/38035222486.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160963d212a8d9---kuxurejupawokija.pdfIn PDF document text
    • http://newgrids.com/userfiles/file/84283669758.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/nbdgs34fdnanh7f36fkdafonaf/88739887647.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/b3d1baeff06a755b0058fed886b2c11c/93789243024.pdfIn PDF document text
    • https://dentalrud.com/userfiles/file/sukibubi.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/af3417593ace9027accfe99f3783c27e/dubajolovanewa.pdfIn PDF document text
    • https://marljivo.hr/UserFiles/files/96963683384.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/65b05063a407fb563a880a76ddc72f68/33930631909.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/e10699f676d0332fcc2defdcdf19d832/33587956502.pdfIn PDF document text
    • http://timavoshipsupply.it/userfiles/file/godaxatokuvukak.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/soxoliminarafaro.pdfIn PDF document text
    • http://immobiliareborghi.com/userfiles/files/7882548302.pdfIn PDF document text
    • http://hnysft.com/d/files/dawunixuwidar.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16079462f66642---fobubalekurolaf.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_off0000ff56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF56 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001176d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1176D 10944 bytes
SHA-256: 9f4eff9f9c11e6bfe37ef2c5e8002caa9d522d76ab618e22eba5fa29d14debc8
font_02_sfnt_off000130bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130BB 17920 bytes
SHA-256: 2e713a682d35eaf33c9eb38262fd1a8baa5552d429bd2821c038fdc724a06bad

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