Malicious PDF — malware analysis report

Static analysis result for SHA-256 68535dff5b4972f7…

MALICIOUS

PDF

130.5 KB Created: 2021-03-22 16:22:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: eb7390ecc9b6c425da4d24fd3cbee1de SHA-1: 5b1ccf2ab8e69d430a690e5ff330e565a3c3cab9 SHA-256: 68535dff5b4972f7825e1ac935a555981fc3a837cc3e3d75681b8cd11c632676
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. This suggests the document's primary purpose is to manipulate search engine rankings or to distribute a large volume of potentially malicious or unwanted content. While no scripts were explicitly extracted, the presence of numerous external URLs and the ClamAV detection as 'Pdf.Phishing.Trojan' indicate a malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://golowaki.ru/award?keyword=platonism+mathematics+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382430/normal_602002463580f.pdfIn PDF document text
    • http://gesabagipo.22web.org/metric_unit_conversion_word_problems_worksheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379603/normal_60292fe2bfd67.pdfIn PDF document text
    • https://waguxezemi.weebly.com/uploads/1/3/4/7/134703223/a38a7e6f.pdfIn PDF document text
    • https://mokomowu.weebly.com/uploads/1/3/5/9/135969792/b09ce739.pdfIn PDF document text
    • http://tadakon.iblogger.org/maltrato_psicologico_definicion.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466135/normal_6006961ed30d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416513/normal_6010c7f05581d.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
    • http://nixomirorubu.myartsonline.com/how_to_thread_singer_heavy_duty_4411.pdfIn PDF document text
    • http://xikisefux.epizy.com/54045110692.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/99468769373.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/gerizaxivifesokiliw.pdfIn PDF document text
    • http://fudogupadi.rf.gd/18139058242.pdfIn PDF document text
    • http://dowexibagodi.epizy.com/what_year_did_the_dell_latitude_e6430_come_out.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/95210341657.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/quadratic_equation_worksheet_tes.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/7698191387.pdfIn PDF document text
    • http://jumepenitujox.atwebpages.com/leave_work_on_time_meme.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/types_of_variables_in_statistics.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/30742208249.pdfIn PDF document text
    • https://s3.amazonaws.com/wanalovum/35361914370.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b1aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B1AA 5088 bytes
SHA-256: b99a229a80b8a0d6048520cc985c08d935b50787f3c9fd33ca9ae691f0e7afe7
font_01_sfnt_off0001c2c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C2C7 13260 bytes
SHA-256: 7662d6591de5fb5de437f7e5d5b14cfa17588ffbd3490141328c9099274b9e11
font_02_sfnt_off0001edcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EDCB 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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