Malicious PDF — malware analysis report

Static analysis result for SHA-256 22f29f9e05d9c67d…

MALICIOUS

PDF

79.8 KB Created: 2021-06-11 07:26:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: ae1a1c0cb1e2b6b4bafcab36fa0b015f SHA-1: 96f1222e4fa3e5126f7bc9c605d62baab59429fd SHA-256: 22f29f9e05d9c67d679e9173e198832671b9e0c8dd32ccc8e817a0ac652038cb
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 links to compromised websites, many of which are hosted on WordPress installations and appear to be part of a link farm. The primary URL suggests a lure for downloading a Minecraft mod, indicating a likely phishing or malware distribution attempt. No scripts were extracted, but the presence of multiple malicious links points to a clear intent to redirect users to potentially harmful content.

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
  • 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://krisoc.ru/uplcv?utm_term=minecraft+pe+pokemon+mod+download PDF link annotation
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/c18anpdvkg6jd9p9ujhubqnmla/pegatonozezovimajatubu.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/814223a587b5a4274c8755dbf5fb04fa/98613902817.pdfIn PDF document text
    • http://ghhs1968.com/clients/5/57/5762190d0a265df614d1f295a7060a42/File/78047591911.pdfIn PDF document text
    • https://hkparkkonutlari.com/image/files/563921476.pdfIn PDF document text
    • https://bursakaynak.com/userfiles/file/37809056856.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/0f5e7c3buorkklei45fbr0v52b/bowagal.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8047d3996---52134306139.pdfIn PDF document text
    • http://cngwalk.com/fckeditor/userfiles/image/93664897395.pdfIn PDF document text
    • http://scheiden-maassluis.nl/uploads//file/67562309546.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/j9fbu1bqtsk6qqq0s2rj3r01in/14627170547.pdfIn PDF document text
    • http://atek-ent.com/upload/file/detuzogazubewubusavawub.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/550ddd65e81691b5d87d730b1ada90db/zukanimovaluvob.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/6c05b10fce8ae45326a41dd3f6faf71f/62838023128.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/def1d13934f15be61752e7f8ed0abcc4/juzotikoz.pdfIn PDF document text
    • https://guapa2.com/admin/fck/file/41478464859.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://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_off0000e090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE090 5072 bytes
SHA-256: c485f3f0a30efc6a6dfd336143372c46a42bda9602a350a0e4aee85a601dd89a
font_01_sfnt_off0000f1c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C5 15812 bytes
SHA-256: eecfa51d950d157e5ad21c75db7e616f6989ea64db293a322eba51cbe75ecb06
font_02_sfnt_off000121f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121F6 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333