Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ded8b9bf9a095e7…

MALICIOUS

PDF

84.2 KB Created: 2021-09-09 08:17:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 51100356e0b0b66a5ac35cbecf048e74 SHA-1: 556f8b6e6b46426c8dd8d73b98897d108cb44bd8 SHA-256: 3ded8b9bf9a095e786e8382803424a6504f6bad315a951d33e83c60af24de0c7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as 'Pdf.Phishing.Trojan'. The file contains numerous links pointing to external websites, many of which are hosted on compromised CMS uploads or disposable domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the overall structure indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://philabc.ru/uplcv?utm_term=what+is+update+from+adb PDF link annotation
    • http://alacarte-design.de/userfiles/file/nibigorofamedi.pdfIn PDF document text
    • http://serramentisiciliano.it/userfiles/files/54599599850.pdfIn PDF document text
    • https://zifu-tech.com/app/webroot/userfiles/files/godisomomatamo.pdfIn PDF document text
    • https://dichvumayphoto.vn/webroot/img/files/fixawopub.pdfIn PDF document text
    • https://ksi-system.pl/editorfiles/file/kabavi.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/4cfb85aea30181ebf8b8e671bd0ca59f/2159751853.pdfIn PDF document text
    • http://xn--9w3b270a7kf.kr/ckfinder/userfiles/files/pokizewojevelabomomev.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138dee19e046---16080408859.pdfIn PDF document text
    • https://naucharts.com/ckfinder/userfiles/files/42083249888.pdfIn PDF document text
    • http://thestarbusan.com/FileData/ckfinder/files/20210905_F8B5A6970568718F.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/16139861408045---16652090622.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/16137ffbf00bfb---dexaxusatesanoxinutipi.pdfIn PDF document text
    • http://bobiniauto.com/userfiles/file/guxoguwatamifovomomuvem.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136391b0cd5d---vurafoxebutabopi.pdfIn PDF document text
    • http://perksys.com/userfiles/file/salifubeteroruxiguwez.pdfIn PDF document text
    • https://aznamaste.com/ckfinder/userfiles/files/duriseguxegaji.pdfIn PDF document text
    • https://mimpiindah2.com/contents/files/mobobadub.pdfIn PDF document text
    • http://ansing.nl/userfiles/file/bepazavipegupotupusuwawoz.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/ed9ba06bca7b377b42f9043e52cb2d4d/vomuliresuxakojaz.pdfIn PDF document text
    • http://metalzilemboeventi.com/userfiles/files/mefaw.pdfIn PDF document text
    • http://www.childofafrica.org/media/userfiles/file/8932957260.pdfIn PDF document text
    • http://maremio.ru/admin/ckfinder/userfiles/files/kazutiwivodagupapikedub.pdfIn PDF document text
    • http://luchetti.it/userfiles/files/vasebuvi.pdfIn PDF document text
    • http://posicert.com/upload_fck/file/2021-9-9/20210909081324413020.pdfIn PDF document text
    • http://thesei.com/In 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_off0000e32d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32D 18244 bytes
SHA-256: ed62c4782dd0015c58cc920240df57896d50742e2e8df806fc220d25031f0daf
font_01_sfnt_off0001120c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1120C 10844 bytes
SHA-256: f86de408ed23b0a0c55fda9f2c914d420543db72cc6714d9fba1c7cbb8a5f803
font_02_sfnt_off00012ae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AE7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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