Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee1d756c3d41e11a…

MALICIOUS

PDF

81.7 KB Created: 2021-09-05 12:22:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: b1124230ee13c4517e6f15cd66ddc64c SHA-1: bb25bbf89ad3483f804ecb8b8bcf8a015d2b1f5a SHA-256: ee1d756c3d41e11af50873bf3cfc0c6b0395e758d02afd457d3d13b5b5c51247
176 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting it functions as a lure to redirect users to potentially malicious content. The PDF structure and embedded links are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c848c7f900---43880388260.pdf In PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/265dcfbc2e7138d624457ec13930e8f4/57530342564.pdfIn PDF document text
    • https://theatresaucinema.fr/uploads/file/77587847468.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/pupivunuxexexebetin.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160821de4a3e35---1684046393.pdfPDF link annotation
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd441c5f93---98543258836.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/88195175638.pdfIn PDF document text
    • http://rs-entp.com/upload/file/tulowedunulov.pdfIn PDF document text
    • http://igorodstore.ru/files/userfiles/files/12631060158.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/eeo6gqdcqgd86tcu20ngch7t76/28500630678.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3b03b763b---pogepogodew.pdfIn PDF document text
    • http://lsphc.com/userfiles/file///52912695235.pdfIn PDF document text
    • http://yangs-ns.com/ckfinder/userfiles/files/20210831032208.pdfIn PDF document text
    • http://kelvista.lt/images/files/93036911900.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/4dsdaogo9spgtsetsera7n4et2/1931112093.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/d2ac677494c3161d6f9feb9933234c81/petiganezejujokeliboxajaw.pdfIn PDF document text
    • https://danielfelber.ch/userfiles/file/29364621474.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/idgm851ejv3ne6oa60ev3bjvvf/gobatubemow.pdfIn PDF document text
    • http://ulrike-mayer.de/userfiles/files/werisukozatidutola.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a1b870007---6847702544.pdfIn PDF document text
    • http://flatadministration.com/uploades/fckeditorfile/ropuminopa.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/76217638151.pdfIn PDF document text
    • http://bebelino.ru/userfiles/file/37328952094.pdfIn PDF document text
    • http://flyingfish-stay.com/userfiles/file/16747098745.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=same+old+lang+syne+piano+sheet+music+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_off0000d7e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E6 18104 bytes
SHA-256: 433049a2e60d597b251d6a3f27924f739f89ad1d99469e881a7e12a4486e1ce7
font_01_sfnt_off00010737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10737 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011f4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F4E 11256 bytes
SHA-256: 07136b48ef3ad0af9e50683c8513185fd9a16413f6fc3c8a2a11c95c0ec77773