Malicious PDF — malware analysis report

Static analysis result for SHA-256 54ca8e1441412c6d…

MALICIOUS

PDF

73.9 KB Created: 2021-02-03 12:56:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 75b705ab000c177b007337bfcb7b61dc SHA-1: 7346d7837772de18eecd8bd8b42241e17f582fab SHA-256: 54ca8e1441412c6d2c5052c60eaed7461549d358c1664bad0d676d8a34203673
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maypoin.ru/123?utm_term=lion+head+bunny PDF link annotation
    • http://cocobuka3.xyz/galuzejovinufoxanokopibuqluf.pdfIn PDF document text
    • http://lenemoloj.22web.org/94801035044.pdfIn PDF document text
    • https://cdn.sqhk.co/dujujema/cfiijgo/siren_head_sound_effect_roblox_id.pdfIn PDF document text
    • http://rimka.xyz/96033623836pbcd1.pdfIn PDF document text
    • https://cdn.sqhk.co/dodiniwotud/sicpXif/soul_music_60s_70s_and_80s.pdfIn PDF document text
    • https://ruxibini.weebly.com/uploads/1/3/2/6/132680870/46fbad113f.pdfIn PDF document text
    • https://cdn.sqhk.co/zadirajuviku/rEihhe0/uber_driver_salary_texas.pdfIn PDF document text
    • https://lufuneliza.weebly.com/uploads/1/3/2/6/132682735/vufonowe.pdfIn PDF document text
    • https://gofolepoxi.weebly.com/uploads/1/3/4/8/134882907/230d6aa4b.pdfIn PDF document text
    • https://cdn.sqhk.co/jekunesoru/ZPLKGie/14039457937.pdfIn PDF document text
    • https://cdn.sqhk.co/tinipuded/qe1hfja/phoenix_suns_players_1995.pdfIn PDF document text
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/557a02a.pdfIn PDF document text
    • https://vamepaxokuwi.weebly.com/uploads/1/3/5/9/135959455/8917407.pdfIn PDF document text
    • http://ru-en.xyz/17422437906l46pt.pdfIn PDF document text
    • https://xirovule.weebly.com/uploads/1/3/4/7/134749068/torufujagoxotulal.pdfIn PDF document text
    • https://cdn.sqhk.co/febowozefu/hitVTeq/adobe_photoshop_camera_supported_devices.pdfIn PDF document text
    • https://cdn.sqhk.co/dozumapufa/je8gdhh/tiroj.pdfIn PDF document text
    • http://winsbig.space/14820670835gp94a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE577 4788 bytes
SHA-256: 39bf18e1cc5e2ba15c5a06f10a1cd42917d71c360a9040a431c58e6dd8a8642a
font_01_sfnt_off0000f5c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C8 11040 bytes
SHA-256: 67e48f970565cf43e1800321f88e3b347147f2917d2ed34d60bc3c476875961c

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