Malicious PDF — malware analysis report

Static analysis result for SHA-256 b184f5a983d4ecc6…

MALICIOUS

PDF

79.5 KB Created: 2021-05-20 20:12:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: cb339d1482de17262fee35c444a77be8 SHA-1: 79f0782488f577304bff707f564b1040b799c178 SHA-256: b184f5a983d4ecc6927f18927058b473ab733dcc2c9616386d7b607e95b3a438
96 Risk Score

Malware Insights

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

The file is a PDF document that contains a URL disguised as a rental application. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded URL points to a suspicious domain, suggesting it is used to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/strik?utm_term=california+association+of+realtors+rental+application+2019+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4474475/normal_601a109e5a6b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500183/normal_606cb1d8b1d52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417530/normal_604dd3459d707.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/jowutoneranemuk/31144791874.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/percy_jackson_tv_series_disney_plus_trailer.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/wobilepotanuvonuzanajas.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/wevinuzutorebuti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00fbc6d8-63c6-431a-9260-20535d378860/pozigizovevifojokizoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cac7fe82-5d14-4919-8875-fd6f1fd843e3/82154204828.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/13644301007.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/project_manager_jobs_salary_range.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f532651b-7879-42a4-b215-f840ea58dee1/how_to_calculate_per_capita_income_of_india.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/best_psychology_books_on_human_behavior_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1f53bd7-4ed6-47d7-9c24-9793d226edd0/54378549522.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_off0000f74e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74E 5536 bytes
SHA-256: bba418b6acbf6af316a01921066336a8da723f29a0d481b36c0fe1340deed995
font_01_sfnt_off00010a33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A33 11360 bytes
SHA-256: 3b0d68553fe0ce2f156d57380a5d95de6b5e58412ad28871ab278f3f36a4f173

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