Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd5599d0a6e030a8…

MALICIOUS

PDF

73.8 KB Created: 2021-02-27 21:38:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 54a1b0e88d28c8d31d1881f19fe1b7f6 SHA-1: 9216ff3210bdc6c4d0f4465769c559b001ff37ac SHA-256: cd5599d0a6e030a8c508f899de819c405dbf9e6abf22f55ddd05117709ae96f4
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, indicating it functions as a link farm. Several heuristics, including PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM, confirm this behavior. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. The embedded URLs point to potentially malicious domains designed to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/wix?keyword=btd+5+hacked+weebly PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4402964/normal_6003a5d586a77.pdfIn PDF document text
    • https://tobejisexin.weebly.com/uploads/1/3/1/4/131454505/8e72c3c7cedf38a.pdfIn PDF document text
    • https://delazodudiz.weebly.com/uploads/1/3/4/5/134591817/zififokes.pdfIn PDF document text
    • https://danevetiwa.weebly.com/uploads/1/3/4/6/134600357/51a77c6e4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472506/normal_5ffdf46281c66.pdfIn PDF document text
    • http://zunuruxeguxifi.mygamesonline.org/fijavunabudoma.pdfIn PDF document text
    • http://kopogaxepaku.sportsontheweb.net/fearless_song_download_-_mr_jatt.pdfIn PDF document text
    • https://tagakokiginozol.weebly.com/uploads/1/3/0/7/130775172/1969568.pdfIn PDF document text
    • https://vulajavup.weebly.com/uploads/1/3/4/6/134683256/reladej.pdfIn PDF document text
    • https://falojabuvo.weebly.com/uploads/1/3/4/7/134774067/roginila.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/7507058742.pdfIn PDF document text
    • https://sexozorojupur.weebly.com/uploads/1/3/4/3/134390270/5660275.pdfIn PDF document text
    • http://sepoxudozixo.sportsontheweb.net/maytag_quiet_series_100_dimensions.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://pevipitoz.atwebpages.com/sazusiz.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/joxolisomivavemexosoz.pdfIn PDF document text
    • http://gogujigasad.onlinewebshop.net/vizozubukenonegudeposaxo.pdfIn PDF document text
    • https://s3.amazonaws.com/nagudo/pesafobaxikufigubi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A4 4848 bytes
SHA-256: 7418fbe9448621da42597f114f25351e0d9515038b5ca3227dfc4c08b860261b
font_01_sfnt_off0000ea48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA48 10008 bytes
SHA-256: 028a425cc382d8f8e580db8ff1c129c2e4f3d435b2798f0f87f853858938dc80
font_02_sfnt_off00010c82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C82 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

Open this report in the interactive analyzer, or submit your own file for analysis.