Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3a46f1f570236eb…

MALICIOUS

PDF

80.4 KB Created: 2021-09-04 17:59:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ded5e066b21f2f59dba098d9984116b2 SHA-1: 73641002b3420469ebd33b0a9f83f94d1b0b244d SHA-256: c3a46f1f570236eb08040f393ed8314a5cde836cfa9bd18f79a783278264798a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous links to potentially compromised websites, indicating it functions as a link farm. The presence of these links and the overall structure suggest an attempt to direct users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608b970070640---12907429805.pdf In PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160857afde55cd---22861512012.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16070c1f58e407---77746508701.pdfIn PDF document text
    • http://demirlermetal.com/resimler/files/20405667595.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3a761fb83---pimaniv.pdfIn PDF document text
    • http://jiuxingchaoshi.com/uploads/file/132226016905.pdfIn PDF document text
    • https://funke.be/data/file/mosakiduladu.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a84f6cf24---gevaguxerarefafewosi.pdfIn PDF document text
    • https://ost-fogging.com/upload/files/45583511710.pdfIn PDF document text
    • https://e-room.co/userfiles/file/14197853282.pdfIn PDF document text
    • http://giaexploring.it/userfiles/files/99781627711.pdfIn PDF document text
    • http://gmkms.net/upfile_editor/2021/files/digogomib.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/33285905940.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/lt2741lffpkhfu56afdvfp59b7/kipukod.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/97032981573.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/l9foi3gvr626ln5lgfgdiu1b33/75812281009.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/7062307964.pdfIn PDF document text
    • http://retco.ge/ckfinder/userfiles/files/46381117215.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/23f7ef9674a155ea4a12d7e6686ce231/fufuneda.pdfIn PDF document text
    • http://dentherapia.hu/files/file/worujawowoferufini.pdfIn PDF document text
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/0a2ev30mop59ena53jat8gajcv/92554034421.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/janinik.pdfIn PDF document text
    • http://pappteam.hu/userfiles/file/wubereruperagonakapumuf.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/40e821e673019ab05f179feebfbd9ae8/wagux.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/99555561057.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=causative+agent+of+malaria+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_off0000d66b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD66B 16996 bytes
SHA-256: 653e6e5051cb4150b88363705d786ffb268abb996df9c84ae4f33cf5868a5bcb
font_01_sfnt_off00010287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10287 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A9E 11036 bytes
SHA-256: 4ecf92e332eb1e47543fd2b4390c30f9d9ff4afbfd9661d19e0b82ce71bc38bb

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