Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f1a32859ca5a4c5…

MALICIOUS

PDF

77.0 KB Created: 2021-04-02 18:23:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 248845d952302f6889f6aa9620151217 SHA-1: 46ad5f1ae959560c0c66c6967b7e1adddfa18230 SHA-256: 9f1a32859ca5a4c53cd30544d0b18719f7b76c0afbd15422655c08e905e0def8
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The document body, though heavily obfuscated, appears to be a lure related to a TV show, directing users to external URLs. The presence of numerous embedded URLs, many on disposable hosting, strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • 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 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://golowaki.ru/strik?utm_term=are+damon+and+elena+together+in+the+books PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4379034/normal_6007d2176c416.pdfIn PDF document text
    • https://niwonuruvi.weebly.com/uploads/1/3/4/7/134767359/7caeddfa352d.pdfIn PDF document text
    • http://copyrights-notices-helps.com/53429162983ryus.pdfIn PDF document text
    • https://muvomajivogi.weebly.com/uploads/1/3/4/3/134373377/nubusifuk_xuwufotixu_perijodepapef_javojiwaxaxek.pdfIn PDF document text
    • https://legovizadedugid.weebly.com/uploads/1/3/1/8/131856283/fetedilifat.pdfIn PDF document text
    • https://cdn.sqhk.co/gidenateg/cgghbCy/4242301582.pdfIn PDF document text
    • https://fimedezederuru.weebly.com/uploads/1/3/4/8/134884956/7a187c1607a83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487191/normal_604389842a673.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451755/normal_5fe00eeb68511.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409095/normal_600929f54157d.pdfIn PDF document text
    • https://nitesefoxon.weebly.com/uploads/1/3/1/4/131453907/439827.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377704/normal_5fdc4424c9c58.pdfIn PDF document text
    • https://xakirajurupani.weebly.com/uploads/1/3/2/3/132303083/2595797.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416501/normal_6024306123138.pdfIn PDF document text
    • https://cdn.sqhk.co/zenetofuma/hgMihAt/xisifubisiziroxegozubaf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410206/normal_5fcbfa1888d21.pdfIn PDF document text
    • https://lopiranurepo.weebly.com/uploads/1/3/4/7/134735856/38f516a.pdfIn PDF document text
    • http://usacreditreport.info/sanyo_pro_xtrax_multiverse_projector_user_manual95za4.pdfIn PDF document text
    • http://iuts.space/vavudiluwajilulazo6vr2f.pdfIn PDF document text
    • https://cdn.sqhk.co/numavagoko/iiiilih/11601852511.pdfIn PDF document text
    • https://cdn.sqhk.co/jumivosokigo/Ngighva/minecraft_cops_and_robbers_thumbnail.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375087/normal_6030d215594db.pdfIn PDF document text
    • https://lemapemoj.weebly.com/uploads/1/3/4/0/134040436/5acb4aabf853.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500187/normal_605c534dd4dd9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481161/normal_601c65e62bfb8.pdfIn PDF document text
    • http://soldatskaya6.ru/cu_t_ming_n_l_ming_nhc_ting_aj1zl4.pdfIn PDF document text
    • http://azorocheat1.xyz/30722892163igmpr.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_off0000eedc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDC 5432 bytes
SHA-256: 95f804c68d767f88666f70351cc2c48de93d0a6ac4dc19bf418a4b0f3792a0e3
font_01_sfnt_off00010126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10126 11492 bytes
SHA-256: 4841c6c4bda3668b7560e7e32a56ec7f213eef25f7f0d07c5b63d244a9321246