Malicious PDF — malware analysis report

Static analysis result for SHA-256 e123c41f60e40aff…

MALICIOUS

PDF

78.1 KB Created: 2021-03-16 09:04:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 70553ed75eea7b5ca45895a97173342e SHA-1: 75823a8c4ce306a9bf5eeaeba37953b377dfd394 SHA-256: e123c41f60e40aff3e3e2dbbc7ca4df9efc128650727a0ddc305927e88c20c99
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, with one pointing to 'seumenha.ru', suggesting a phishing or link farm tactic. Although no scripts were explicitly extracted, the PDF structure and the presence of external links indicate a potential for malicious redirection or content delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • 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://seumenha.ru/123?utm_term=characteristics+of+life+worksheet+pdf+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4418972/normal_600e7f95d0b58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475728/normal_603aa16b33619.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459477/normal_60115f4ca202d.pdfIn PDF document text
    • https://likifovufuli.weebly.com/uploads/1/3/4/5/134588617/19e1b8814c.pdfIn PDF document text
    • https://subegudikowezi.weebly.com/uploads/1/3/4/4/134476363/7659633.pdfIn PDF document text
    • https://nokivuvaxeg.weebly.com/uploads/1/3/4/5/134594014/2837073.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461761/normal_60221427ef8e1.pdfIn PDF document text
    • http://fojukivijivik.medianewsonline.com/les_miserables_songs_castle_on_a_cloud_lyrics.pdfIn PDF document text
    • http://lerimofo.mywebcommunity.org/6696347049.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382209/normal_602ab1d2c770b.pdfIn PDF document text
    • https://gepadera.weebly.com/uploads/1/3/0/7/130740344/kibakipewu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b456fca-033f-486e-9579-c8dd08d4b30c/rubodosalixakanawutegura.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/in_christ_alone_presbyterian_hymnal.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/burorosojon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3741e94-8b49-485e-ab49-f9f20c7ff95e/nuruxaxowipatofujametag.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/pobog.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/34062134718.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/pufegimesore.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/nojiwerodijewokusinikejum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4889b63a-563a-43aa-acba-dd450670968e/basic_electronics_mini_projects.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c753cfa-28fe-4cb0-be81-fa45eaead8ce/where_is_the_high_limit_switch_on_a_goodman_furnace.pdfIn PDF document text
    • http://wipibefab.onlinewebshop.net/dark_souls_series_bosses_ranked_by_difficulty.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78c53810-1867-4963-ad53-10c1d76d321c/tojipavopofebigukekadim.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/nodelapobupedujibidifij.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/photo_background_apps.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF454 5304 bytes
SHA-256: a773aaa35bacb816390bb525a9ed10b97907df51fdacfaabd8885d14e2f29a5a
font_01_sfnt_off00010669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10669 10812 bytes
SHA-256: 87c0814869cc61afd41bdfd584e3d2375f62366b85d40780cd691a5451da81d3

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