Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a145939059fd7b9…

MALICIOUS

PDF

75.2 KB Created: 2020-11-18 02:46:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ad76ed8a8f1d6d2c0517f9304b810c88 SHA-1: 4422fb8c2f696a62fdde15933d65e499fe983614 SHA-256: 0a145939059fd7b9b2f777ab7d9ef2bc1e6be0a63cb173e7f3a9796133aecc21
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a malicious intent to direct users to potentially harmful websites. The ML classifier and ClamAV detection strongly indicate maliciousness, with the primary IOC being the initial external URL which likely serves as a gateway to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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://traffnew.ru/strik?utm_term=werewolf+transylvania+discord PDF link annotation
    • https://vusuvorolom.weebly.com/uploads/1/3/4/5/134501440/vumanewuvus-nipokozuwen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366984/normal_5fad50f9ea5c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457311/normal_5fa8607cb9a32.pdfIn PDF document text
    • https://mixorone.weebly.com/uploads/1/3/1/4/131438240/bamoradekepimugozup.pdfIn PDF document text
    • https://pemesekisubabas.weebly.com/uploads/1/3/4/6/134659876/8681381.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476578/normal_5fa8739e34fd9.pdfIn PDF document text
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/samesuseliju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366957/normal_5f87d818ae9cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369505/normal_5f964d290cdf2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367645/normal_5f874dcc597ee.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
    • https://uploads.strikinglycdn.com/files/62b25edf-0eb1-4336-ae01-8d5650ccd8cf/87230152725.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/ladokikuvap.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC93 5072 bytes
SHA-256: f66bb64923e7ec2288b248714117d2cf67ee07fb3922108a5d4e384d78b94657
font_01_sfnt_off0000ddef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDEF 3084 bytes
SHA-256: 80a3c7c275c648d7e6cab5f5f08fbcc5f219b2670e17d9ac618bb49811397157
font_02_sfnt_off0000eacc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACC 11392 bytes
SHA-256: 2501a6d35b7ccda8274debd57ca523eefe67c5c1979b14454315387f1a5ec3b2
font_03_sfnt_off000111a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A1 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

Open this report in the interactive analyzer, or submit your own file for analysis.