Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d66144c0d27911c…

MALICIOUS

PDF

75.6 KB Created: 2021-04-12 00:54:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: d5ec1ec10c3b3c89937b67e2ad246cc9 SHA-1: 490903b8a814a332cc96ce0a9b656d57cdcd5ff8 SHA-256: 5d66144c0d27911cf63a7ae9b053905b5a485b70c47fe2515fef734c111e1059
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing campaign. The document body, though heavily obfuscated, appears to be a lure related to a business book analysis, aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://baarspo.ru/strik?utm_term=five+dysfunctions+of+a+team+analysis PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454179/normal_6023dc0cf0f02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368950/normal_6036060c93d93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404984/normal_60306271d44d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382781/normal_6060338040fa6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383795/normal_6007caa8dba81.pdfIn PDF document text
    • https://dugezuwodovapa.weebly.com/uploads/1/3/0/8/130874298/palol-wosonedogin-vurejufe-levovasis.pdfIn PDF document text
    • https://likemopulijufo.weebly.com/uploads/1/3/0/7/130739197/nosavisonojodoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412183/normal_5fe94b728b808.pdfIn PDF document text
    • https://wurixexaf.weebly.com/uploads/1/3/4/8/134865586/87c986c4e49a10b.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/sugosubexez/25853154411.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/my_cousin_rachel_movie_free.pdfIn PDF document text
    • https://20996a60-9695-4f45-8fdb-44bdc783da55.filesusr.com/ugd/c57cae_9922f43c4dad4036b47c094dd22de7ee.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5d5db2c-ba9a-4c41-8743-bdcb5fb86262/zuvowenefabelu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe330d98-eb05-4ec1-b7ae-e7f5ddc04f45/napejutapubunej.pdfIn PDF document text
    • https://8459f3b7-b2e6-4b58-af31-5f29adf293b7.filesusr.com/ugd/a68450_573557a224ed4251a8985af6a6f8f58e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/40186006990.pdfIn PDF document text
    • https://9a60fab3-6fb0-4be7-9305-b2e3cc44d963.filesusr.com/ugd/811c4f_e2fcfd1b0af4406eb2f286161beef282.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/neviwove/puvupipidopuxidepurubo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2191c48-42e9-4a3e-88d0-7f29619b1f83/duxotakoxazepupewud.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/43480446534.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_off0000eade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADE 5188 bytes
SHA-256: f5292bf22f019997c1a3cf996757bb835fc5f7e020827019562826b25ae6fb14
font_01_sfnt_off0000fc8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC8B 10248 bytes
SHA-256: bdb96b8f6bf14755b94588d9ccbad94e16b0c3c722c1cb4584770edd1338d0f6

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