Malicious PDF — malware analysis report

Static analysis result for SHA-256 1beaa6f8ab85787d…

MALICIOUS

PDF

192.0 KB Created: 2021-05-24 04:26:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 87755d694a265e7446e3b93f2c227760 SHA-1: 03938c4b7b05f04886a82cef65fa3389eea990fb SHA-256: 1beaa6f8ab85787d727d5f4aea481749a5034d5b38145c56102cd62eb5728f04
96 Risk Score

Malware Insights

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

The PDF file contains a URL that, when visited, likely leads to a phishing or malicious site. The document body, though heavily obfuscated, appears to be a lure related to a scientific query, suggesting a phishing attempt to trick users into clicking the malicious link. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://fokemale.ru/strik?utm_term=what+are+the+three+types+of+rna+polymerases+in+eukaryotes+what+are+their+functions PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404290/normal_602dca20c2ee2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401538/normal_601495a8e4627.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497082/normal_605fa4281b4a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485321/normal_5ff8cb173eb6b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406775/normal_5fcf60ce2b9ae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484364/normal_5fcc078150d4c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408186/normal_5fe0c77e6a4c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420034/normal_602646da97910.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450724/normal_601f554d97fa6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403408/normal_5fec9f163a7cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370985/normal_5ffb7958374b8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454670/normal_5fc7b8a3222df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422893/normal_600e4f66e0278.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454042/normal_5fe39d8d3f53f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5e448b0-66bc-4a89-9f2e-7f9d426667cf/75497182742.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/dilawebo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a65eaf86-262c-4a69-8350-6ef364235216/psychoanalytic_theory_application_in_literature.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2817eef5-54ee-4c67-8142-7d14e175c389/18566415786.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11f136e9-b2f9-4331-97b3-82b3007d913c/madebuwa.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/3d_model_free_for_unity.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00029a58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29A58 5528 bytes
SHA-256: 3bae9375159d35632f7a9baf0b4390a4bcbf0d7705be04cd735b1534ab5f91fc
font_01_sfnt_off0002ad1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AD1D 14108 bytes
SHA-256: 8f681d8a24eaa0afe09e3067fb60b99d68a3b4d94ba061ae12a6f6dc306e9071
font_02_sfnt_off0002db4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DB4A 16204 bytes
SHA-256: dcfd79364a1afb0826aac91800a1ed8698d859c0f37e9fd341bdf89d2e2a9ef1

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