Malicious PDF — malware analysis report

Static analysis result for SHA-256 04d6792cb751d0ee…

MALICIOUS

PDF

92.7 KB Created: 2021-07-08 00:52:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: ae81e3dd5bb0897481dfe5292afad00f SHA-1: bf6bd9a5c02d92b1e2c31c0c8af53066133a9e8c SHA-256: 04d6792cb751d0eebbc494b420ecd9dab0cc9d9065743276304118ad061f4e62
156 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to numerous compromised WordPress upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. The primary function appears to be redirecting users to potentially malicious content hosted on these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160a92e7cc3aac---bemugememibavup.pdf In PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/a7065b123645ac3e96768979bb52bd5f/mupuluvoba.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c30e3b51221---71031726322.pdfIn PDF document text
    • http://dexgerm.com/data/file/userfiles/files/zurebexe.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4805d0306c---senege.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/022tci7b0f7nj9asui6k2emsv5/31755320062.pdfIn PDF document text
    • http://joyearland.com/ckfinder/userfiles/files/50292771948.pdfIn PDF document text
    • http://ducthoaudio.com/upload/files/81931677957.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/0a9303b8c65baa6aa94ee105fea4b7f6/63610059897.pdfIn PDF document text
    • http://muskogeeroughers1967.com/clients/9/98/9899c641331876fb313f08ec475a0443/File/12834414663.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160b2b8cd719f5---bafexolawiselobosovu.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c1dd4a4c084---midubigebenowadebuwimivog.pdfIn PDF document text
    • http://escqatar.com/uploads/userfiles/file/file/jopotirediri.pdfIn PDF document text
    • https://annjulieskarpmo.com/userfiles/file/xekadin.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607e19b17aa73---33576710258.pdfIn PDF document text
    • http://bpabv.nl/uploadfiles/file/gewazemugixuk.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/bcb9244c51e323a3edfa16f5ee434548/56965813328.pdfIn PDF document text
    • https://kuraniterbiye.com/resimler/files/11038892879.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/nr0hlgmie86dkuki56g803nnm3/48833002877.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607620c43bb06---71108910247.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/5af569cdf067114a5953b54f44e11511/muxawigo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=bryce+canyon+campgroundsPDF 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_off0001062a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062A 17924 bytes
SHA-256: 044d812ca4edcb90c2bfbfc2e2ec75f14a7078d226231e5b8541a63ee8e20754
font_01_sfnt_off000134f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134F7 10888 bytes
SHA-256: 109b9a1a61897bde8d22bd98e8f15c4f0bbe549c3d766e37a0b41def6ac18105
font_02_sfnt_off00014df4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DF4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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