Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb180054bc888677…

MALICIOUS

PDF

85.2 KB Created: 2021-04-07 01:16:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 113608f11b25ceef0b68b9df25b8d1ce SHA-1: 908d20b68b4f1e2f01423dc4f63c3578fbe0d4ef SHA-256: fb180054bc88867797931cb19724e27e90ae1cdc97d6f41aedafa164f6c184aa
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://vilenefex.ru/123?utm_term=cessna+150j+owners+manual PDF link annotation
    • https://cdn.sqhk.co/mepapogivoma/iaiczii/jepabizufa.pdfIn PDF document text
    • https://kexulisil.weebly.com/uploads/1/3/4/7/134762119/7a682a5.pdfIn PDF document text
    • https://cdn.sqhk.co/savageven/vjg7ifw/mint_lemonade_recipe_my_cafe.pdfIn PDF document text
    • https://gusoretudofuriv.weebly.com/uploads/1/3/4/8/134885571/5299450.pdfIn PDF document text
    • https://xevibobi.weebly.com/uploads/1/3/4/6/134683071/vezobolamugirilu.pdfIn PDF document text
    • https://cdn.sqhk.co/dilizilozok/ggZLEhc/fevavodamomajonagire.pdfIn PDF document text
    • https://rezezeveg.weebly.com/uploads/1/3/1/8/131871466/linojaruxuja.pdfIn PDF document text
    • https://xatodibe.weebly.com/uploads/1/3/5/9/135966399/nedufodosi.pdfIn PDF document text
    • https://wabuxopimigom.weebly.com/uploads/1/3/4/0/134042903/wamitir.pdfIn PDF document text
    • https://pulapafux.weebly.com/uploads/1/3/0/8/130874232/4998498.pdfIn PDF document text
    • https://cdn.sqhk.co/lagusive/lKifFgg/huawei_health_app_watch_faces_funktioniert_nicht.pdfIn PDF document text
    • https://zijedizadof.weebly.com/uploads/1/3/4/6/134692085/dovug.pdfIn PDF document text
    • http://tigitaja.iblogger.org/14554803079.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://renureva.epizy.com/tebirud.pdfIn PDF document text
    • http://baduwujik.rf.gd/rajasthan_patrika_barmer_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/936baf4c-2a18-43f1-9655-00c02138a0f0/wovuwuzax.pdfIn PDF document text
    • http://sugajuze.epizy.com/90132793240.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4433e6e-6b88-40b8-a85f-bea71c19d816/why_cant_i_see_3d_on_google_maps.pdfIn PDF document text
    • https://849bdae7-2456-4570-9e2a-fc769e7e49ad.filesusr.com/ugd/2074c9_fabe08ba3f2e41e789a21cad8fd5fcf4.pdf?index=trueIn PDF document text
    • https://e966359d-176b-477a-9ad9-c314bea94227.filesusr.com/ugd/fa6f14_ebf6499677b94ba4915233bf69ccbd3d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecd85680-bafc-4e3c-8720-a8cc9707f015/50893351616.pdfIn PDF document text
    • http://zufomukibataj.rf.gd/72571271668.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fcd47a8-da92-4a33-99cf-55aa7af6d729/bhagavad_gita_in_gujarati_download.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E05 5220 bytes
SHA-256: 23373a80119049bad92a1f5079e6691b75e65de8df3e3702608712c816ea3219
font_01_sfnt_off00011fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC8 11524 bytes
SHA-256: 44ad1650d5232f46e134c700ec0fe57e4bb5bf9c7f78c34047e689c5fb4f8201