Malicious PDF — malware analysis report

Static analysis result for SHA-256 09e1c28bc7f4c0f6…

MALICIOUS

PDF

104.1 KB Created: 2021-06-21 02:37:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 1d9730cf8763f259c4f97f6ff58369fc SHA-1: c3b4d79557f38069dac060ecb9b572ad91e18d98 SHA-256: 09e1c28bc7f4c0f6814b5521f0f233929506f5700bc016afc901b1cfb9736cbd
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external URIs and link farms pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution attempt. The document body appears to be corrupted or obfuscated, preventing a clear understanding of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 https://synerhu.ru/uplcv?utm_term=altered+carbon+male+nudity PDF link annotation
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3ec238b9d1---35560725982.pdfIn PDF document text
    • http://ilyxrace.com/userfiles/files/29548659100.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160aecb8046ea0---lukajizabozenibekine.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca2e699ec4---wobowemisowefigatopelil.pdfIn PDF document text
    • http://foto-klub.dk/userfiles/file/baniruvivod.pdfIn PDF document text
    • http://btc-ltd.com/upload/file/69969267333.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/0e7jgrrjcl18ef0aii6ql590q4/33652506787.pdfIn PDF document text
    • http://accronline.com/userfiles/file/dazetemoj.pdfIn PDF document text
    • https://a1-recruitment.fr/v2011/Files/fck_upload/file/zagitaseluxubululajozejez.pdfIn PDF document text
    • http://web68s.com/upload/files/tilopufulufaxiwutisonasu.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160cf9377f3647---20860258923.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/99d7fd0c60ee85516d8f1bf31e8f54a8/tuduwenogadad.pdfIn PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/8861803570.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/99300313160ab8c2dcbd58.pdfIn PDF document text
    • http://allmedicus.com/userfiles/file/29213343125.pdfIn PDF document text
    • http://edgecs.net/documents/26604501844.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/l0mfobfs8akr7i4miti7kkjdh7/kitikipan.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/4qi26o0rvsbcmn92eb6jf67bqp/favevoxujojeposodisunikix.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_off00015877.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15877 5140 bytes
SHA-256: 8e171470f06ef3b9595721be513f510c562ec01f17f14f82880d3d18f7e453f5
font_01_sfnt_off000169e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169E2 12508 bytes
SHA-256: 5719c331bc6ce7a3bb78d72fd543ab260b2ae63601d90584ff60afb13c6985e2