Malicious PDF — malware analysis report

Static analysis result for SHA-256 82a2d3a6c7c9e72c…

MALICIOUS

PDF

77.7 KB Created: 2021-03-14 03:28:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f0c6b4ecdad42831889fe38df5fca4d2 SHA-1: aa465595d6b0f5b47105cd8d33699d7945736db9 SHA-256: 82a2d3a6c7c9e72c294d58259a53260e9b3baebd9b9ef359773436100d552edc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a phishing or SEO scam. The embedded URLs and the ClamAV detection ('Pdf.Phishing.Trojan') strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to 'active voice vs passive voice exercises pdf'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://botokaw.ru/award?keyword=active+voice+vs+passive+voice+exercises+pdf PDF link annotation
    • https://mikezopa.weebly.com/uploads/1/3/4/3/134366842/folaf-gaxoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529281/normal_603945670acf2.pdfIn PDF document text
    • https://jotulamopusojo.weebly.com/uploads/1/3/4/4/134465369/809acb1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469847/normal_602bf78dd4621.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495686/normal_5fe832859dbfc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373301/normal_6021974068403.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380701/normal_6014bb707b648.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491673/normal_603217d568e51.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374839/normal_5fcf518ccf92c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373983/normal_6022914117d2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479917/normal_5fd2e0a1d41a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489035/normal_5fd17f0851e5b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499285/normal_5ff17187a9332.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466662/normal_60028b951db28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477137/normal_60381516e3ca1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470836/normal_5fc6dcf907314.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475217/normal_5ff06bc392c19.pdfIn PDF document text
    • https://kofivenemiwelew.weebly.com/uploads/1/3/1/3/131380814/dedewamozexavez_tewodaraxuve.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453326/normal_603d8d148de55.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407102/normal_6003c43d756e1.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/jivamubug/76854939165.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/blacklist_season_5_episodes_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/terminating_and_repeating_decimals_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/the_african_union_agenda_2063.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/barnsley_ccg_asthma_guidelines.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_off0000f116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF116 5232 bytes
SHA-256: 00702bfcac240c41ae13a49432a3b0a72a410684950d68626964f81d28b26f43
font_01_sfnt_off00010305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10305 11184 bytes
SHA-256: bfdfede0d9ff1f0b48ddb7a6e67ccbfdbee977bd2c7b004a8b2fc5be0a0e02ea

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