Malicious PDF — malware analysis report

Static analysis result for SHA-256 34cf34f1a603ae3a…

MALICIOUS

PDF

80.9 KB Created: 2021-09-21 09:19:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ee93ce740fbd9a301f04f38eac322b8e SHA-1: bb92143e6a47383a0ebcd1738c49d5443c5510f4 SHA-256: 34cf34f1a603ae3ac9241fd3f94a4d490cbcec1d59561f9650f37fd32bed6ffe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the presence of a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to lure users to external 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 0.9911

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://drafthe.ru/uplcv?utm_term=mp4moviez+2020+download PDF link annotation
    • https://1tlstar.com/storage/uploads/files/34940370260.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/161423a52a0273---61826634670.pdfIn PDF document text
    • https://molecult.metallo-tests.ch/sites/web/upload/files/73640307281.pdfIn PDF document text
    • http://dealershop.es/userfiles/file/wevonedevikafekodomezida.pdfIn PDF document text
    • http://sosonomo.com/ckfinder/userfiles/files/66875977178.pdfIn PDF document text
    • http://apartamentosalbatros.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146455a1bd69---xebupemunoxedelaxopawunit.pdfIn PDF document text
    • https://cyklo-wellness-penzion-palice.cz/content/gopabuwem.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/jumeledolerevo.pdfIn PDF document text
    • http://kingkady.cn/uploadfile/files/zinefuwawoxu.pdfIn PDF document text
    • http://gu-bo.cn/uploads/files/tiwovadeja.pdfIn PDF document text
    • http://1night2day.com/ckupload/files/dogikirevitajelanomaxowe.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea596e4d5a---zudigosafunozebaxit.pdfIn PDF document text
    • http://babyindex.nl/images/uploads/24538884694.pdfIn PDF document text
    • http://uhy-th.com/image/upload/files/99779696209.pdfIn PDF document text
    • http://bishnutoursandtravels.in/userfiles/file/koraguwarufotamo.pdfIn PDF document text
    • https://khabul.mn/mmpa/userfiles/files/47299226969.pdfIn PDF document text
    • http://skupka23.ru/upload/m/fejatiloremav.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/ptc9t2b873djocm4v304gfqkf4/75074127123.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16148be9f6a3c3---91848612835.pdfIn PDF document text
    • https://fontan-montag.ru/img/upload/12202089750.pdfIn PDF document text
    • http://architettobotteonpierpaolostudioabacus.it/userfiles/files/13322983482.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/48605972899.pdfIn PDF document text
    • http://bastola.org/userfiles/file/71673979447.pdfIn PDF document text
    • http://baloneacessorios.com/_upload/file///sigilujul.pdfIn PDF document text
    • https://szemvidito.hu/sfwkr/feltoltesek/Images/Image/mazabezenojanaxuxakuw.pdfIn PDF document text
    • http://studiolegalezullo.eu/userfiles/files/98250843399.pdfIn PDF document text
    • http://smartraoptics.com/fck_filemanager_upload/file/27052738385.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_off0000d7a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A9 17244 bytes
SHA-256: a9767ff0dc065c0b121224ff1c4760d3574ac8641858250bd24bb734d08b1953
font_01_sfnt_off000104f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F6 10712 bytes
SHA-256: ab7993bd105a9f9a204f0030ed4388fae0c51a7ccea77736ec9dd4e131e98b05
font_02_sfnt_off00011da7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1