Malicious PDF — malware analysis report

Static analysis result for SHA-256 124c4dc84317fd80…

MALICIOUS

PDF

114.9 KB Created: 2021-06-29 07:22:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1cf0906133f17fcc077b2ff9f24aae21 SHA-1: d1a975f937b2ee7c05144b96e38c0139550ebd29 SHA-256: 124c4dc84317fd80642ee426939e068f54977d1f2187f9c770cb4432781ee8f2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains a link farm hosted on compromised CMS upload storage, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the presence of numerous suspicious URLs points to a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9914

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://kartinatv.org/uploads/files/xaxegufamozu.pdf In PDF document text
    • https://implant-drill.com/userfiles/file/86320759731.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/e4k37h3avji42n33doahbsbvc1/61657908321.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/31b8fd44cec7e80bd83153eaf228a9df/13854230180.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/kmqr5ko7g9hot7hb1i4ivq68no/65159023220.pdfIn PDF document text
    • http://centroolosprato.it/userfiles/files/76138966199.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/d3357f2efbba096c226f93ff9e45f4ed/4107596540.pdfIn PDF document text
    • http://deborahkay.com/ckfinder/userfiles/files/wajifizoxomizon.pdfIn PDF document text
    • http://bennyhigh73.com/clients/3/33/33ce00c6a031cf3b17a3dcf69aaa7594/File/98109235646.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/wofatojaxod.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/eccc41c4a8ecf22143bfe86d87c08075/49625814025.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/52eeefbc3047827f45d8284fdc42c1c9/xisutugezulawesafefoku.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/1472742693609cb7331d40d.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16097c3f6670ad---36428503453.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/1c8a44818630c0389b13df7e415c8a45/61445193281.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b0c12603f24---67770040326.pdfIn PDF document text
    • http://conelser.hu/fck_uploads/file/44399906515.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b402bfca3ec---31887585291.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/d3460ffff3d2393cb24f5838c361690e/walazemito.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/26449672411.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160800ab57e1ef---vokulazorugibem.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a2cc62d9bed---88856995249.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=shark+or+whale+which+is+biggerPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014ae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000162f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162F0 4320 bytes
SHA-256: a4bd328bebf9cce089a1f6499a51789a2e7773b422acfad4084d96e164605611
font_02_sfnt_off0001730f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1730F 18760 bytes
SHA-256: 140a7098c49e024910f1109ea2cd4075a904578f067aba5a9547b9f382353b06
font_03_sfnt_off0001a340.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A340 10700 bytes
SHA-256: e71831cf59103e22a7f58ffb6d3c3c8a79933dd715b71639288af209cfe0aba8

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