Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee9980b4af27be5d…

MALICIOUS

PDF

65.5 KB Created: 2021-03-06 13:43:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: cfbcadeae2eec45b1a87c2902210e4bb SHA-1: 526dee720f8d5794d266952b1a40918301806579 SHA-256: ee9980b4af27be5de444e52fffc3b14d04f5ec22fb5758823fe8b2c27363030e
184 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier. It contains a link farm with numerous external links, including one that appears to be a phishing lure for 'corporate finance institute free courses'. The PDF structure and embedded links suggest an attempt to direct users to potentially malicious content hosted on disposable domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9244

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.
  • 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
  • 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://leonvi.ru/strik?utm_term=corporate+finance+institute+free+courses PDF link annotation
    • https://nibasekugi.weebly.com/uploads/1/3/1/0/131070633/wabamexidomara-burogidasa-jejiwur-lufezirapurej.pdfIn PDF document text
    • https://kadonomu.weebly.com/uploads/1/3/1/4/131454950/034fc0d768.pdfIn PDF document text
    • https://gerugufudob.weebly.com/uploads/1/3/4/8/134869234/a8903e617dd68.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368266/normal_5fc6c61b1e052.pdfIn PDF document text
    • https://kunatelifarak.weebly.com/uploads/1/3/2/7/132712072/50589.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503791/normal_5fd641d334852.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386621/normal_601ce0bcb3cdf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2ad55d82-15d9-4995-b72c-f03dca93b5f4.filesusr.com/ugd/11b7eb_722fca6792df4ecf8cbd6f8cd89ff883.pdf?index=trueIn PDF document text
    • https://f9c81679-ddb1-4746-ab40-32673edc426c.filesusr.com/ugd/2eff39_86828fbfa309407b913244c91bab1aad.pdf?index=trueIn PDF document text
    • https://8ab8d0a6-ebcf-4503-ac90-3c5d9a0926ce.filesusr.com/ugd/8585d4_4be04277fdbf4c9499eec04ca7d73db7.pdf?index=trueIn PDF document text
    • https://69f6cc44-9198-4e41-bafa-43503dba92bf.filesusr.com/ugd/dec231_e149560347c44beebce001bbc64334e2.pdf?index=trueIn PDF document text
    • https://24d1f61b-f5c5-4d2f-8180-62589f44e8d8.filesusr.com/ugd/eed56f_462ab4e2c8cf466abe6c7d8ce690d73e.pdf?index=trueIn PDF document text
    • https://caf0f927-206f-4b4e-aa34-0dd3da53679b.filesusr.com/ugd/83d902_7c8277f4bdb8467baba18cd82d09656d.pdf?index=trueIn PDF document text
    • https://9d349da1-218b-4b59-9e37-2a90cab56d40.filesusr.com/ugd/de9003_4ee1926b90b940508ce05883b7baa6ef.pdf?index=trueIn PDF document text
    • https://eaae50f7-3b1c-4f1b-9b3c-e2a48377569d.filesusr.com/ugd/b96e41_2246e2c341ca47e8afc9fdbb960a4839.pdf?index=trueIn PDF document text
    • https://d04c2b29-3777-4fe6-aaa9-ab96f87c3324.filesusr.com/ugd/43eb95_d5a695b17337464db7876bcd7ad911aa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lebaxa/guided_meditation_under_5_minutes.pdfIn PDF document text
    • https://f6e2a16f-d004-42cd-8f17-0463e090774c.filesusr.com/ugd/c70c35_b8480df95b50488daf0bf96dcfded218.pdf?index=trueIn PDF document text
    • https://f8d4b294-f952-4a11-85e8-0a3036f9bdaf.filesusr.com/ugd/ad8f3a_7104896b8168459ab14fd8c3e0d562ca.pdf?index=trueIn PDF document text
    • https://7133fc40-0b9c-4701-b953-e7fafc934b44.filesusr.com/ugd/70a38d_b587ebdbbce84c1e9eb3591e5a2dfcd8.pdf?index=trueIn PDF document text
    • https://6c8ebe11-725c-420b-823a-68bc39d02ad2.filesusr.com/ugd/3e87bf_0dc44e07ead349e2921296808b356667.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/negonanopix/galacticraft_space_station_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/free_html_email_templates_2018.pdfIn PDF document text
    • https://86b7bb9a-6a0b-496c-a062-e8aa60c365d0.filesusr.com/ugd/dcf311_1a124d06ebdb4d7494ab597fd5774117.pdf?index=trueIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f45f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45F 4880 bytes
SHA-256: 4d3165c527e94d33a293ebe87fd5189c11a715b4d67a4352cce813cec8b9b119

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