Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ba8cbaa2fa8a125…

MALICIOUS

PDF

81.2 KB Created: 2021-09-05 12:17:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4c1ae7d1d397d586e5247da860f97eb4 SHA-1: 0f2e5bbae86a8344d33a1ad5c61cc52bcd2a85d0 SHA-256: 5ba8cbaa2fa8a1252be386510719d22c3bd48288a4cd1b5e633ea3429906e3fa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and a high ML score. It contains a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://andhimazhai.com/images/files/wozabefowosudolakaba.pdf In PDF document text
    • https://www.cittadelmiele.it/wp-content/plugins/super-forms/uploads/php/files/f7cbd25dfeee692789f2d0c6894a8717/nezan.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a8217a74e60---ravojolizonuwemap.pdfIn PDF document text
    • http://yejida.com/userfiles/file/bejawadopepidujuputisafek.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/4c4e340d0f24c1bcbf86f59d07a69271/61734981610.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7f9d60c86---48452656954.pdfIn PDF document text
    • http://ansonseatery.com/uploads/files/dalazotol.pdfIn PDF document text
    • http://thepnguyentran.com/media/ftp/file/94194232327.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b73507affba---36965097781.pdfIn PDF document text
    • http://hagelkonzept.de/userfiles/file/49921734323.pdfIn PDF document text
    • https://gadd-asso.org/userfiles/file/22455560606.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/65033135066.pdfIn PDF document text
    • https://sieompaysdebray.fr/lesiom/txt/imgadmin/file/tadeledujebi.pdfIn PDF document text
    • http://gioiacompany.net/images/upload/file/pegeweja.pdfIn PDF document text
    • https://fertilizerproductionprocess.com/d/files/muzuvuzoxanof.pdfIn PDF document text
    • http://ylpcl.com/ckfinder/userfiles/files/11587580047.pdfIn PDF document text
    • https://gruntbudowa.pl/files/file/65348141344.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/7f4923adb75f1aff8d75bcbbbc09742b/8758819692.pdfIn PDF document text
    • http://proxima-design.cz/files/file/wipixeziziwobovevuja.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/16096444dea5a4---razodoposonegokuto.pdfIn PDF document text
    • http://szentistvanpatika.hu/upload/file/80925491433.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607d856899cd2---56313661431.pdfIn PDF document text
    • https://asharfilalkulfi.com/ckfinder/userfiles/files/bojobutaranuvikubopowilat.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609a68ec974b8---53305139373.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=amitabha+sutra+english+pdfPDF link annotation
    • 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_off0000d8ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8AE 17468 bytes
SHA-256: f376a805d7f9180435e5e0735809cb0e72ac1bdafd0e8179a0068b6167fc3084
font_01_sfnt_off000105ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105AE 11044 bytes
SHA-256: 24155957d08866ad9d216b4a7df9530f599effd832b425b6369b4056c81bebf0
font_02_sfnt_off00011ec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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