Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc7018fffc13378d…

MALICIOUS

PDF

74.3 KB Created: 2021-03-26 08:49:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 34a85413d8773f718ab40f93bd07bae3 SHA-1: b3fe5c9cd3c925b14b717c3d7d4ece673c76b098 SHA-256: dc7018fffc13378d8656f4d4e57cb05b868ff9a4cd3569adc51b6ccee9aa106a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO farms or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the presence of embedded URIs and the overall structure suggest the document is designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://maypoin.ru/award?keyword=having+a+coke+with+you+poem+pdf PDF link annotation
    • https://reratuzofi.weebly.com/uploads/1/3/5/3/135346135/8293901.pdfIn PDF document text
    • http://dodajavux.scienceontheweb.net/resekubini.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369518/normal_5ff9379b80ac6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380068/normal_5ff276f6ce22c.pdfIn PDF document text
    • https://zuvimetuna.weebly.com/uploads/1/3/5/3/135304981/retulagug_wuvejugi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371553/normal_5fe616f2a7f11.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421224/normal_5ffeb3c41e1b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390069/normal_5fd8f5de0f0f3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368489/normal_5ff040758962f.pdfIn PDF document text
    • http://kajuzumanaz.sportsontheweb.net/paradise_lost_john_milton_espaol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370791/normal_5ffcda89ac998.pdfIn PDF document text
    • https://tixowofo.weebly.com/uploads/1/3/4/5/134592641/7351884.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/nadalamotegikodinanatupej.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/interactive_brokers_api_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/bootable_pendrive_for_windows_7_software.pdfIn PDF document text
    • https://s3.amazonaws.com/gagotaniwipure/17223112892.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/68411497343.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/4297881577.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_off0000e1a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A6 5544 bytes
SHA-256: 217a0695a95879aa9ded0484ec5131a18e3409db5f6434c19689e12b9ed80814
font_01_sfnt_off0000f481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF481 11272 bytes
SHA-256: 148e9cdded3ddcdb8976d6154731802b787619a30ddbba3a1b80cc62c3401f4b

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