Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7afb549b1806ae1…

MALICIOUS

PDF

86.1 KB Created: 2021-03-17 19:15:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 3b74d8e1b35a0d1b3a136a11823df9e3 SHA-1: 6267f18201093f4f6c01217c04a6ab14bd7cfaf8 SHA-256: d7afb549b1806ae1e5e7c6f77cfc2611059501511f1aeab03da58655906a0c1b
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains text related to background checks, suggesting a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/wix?keyword=cheap+background+check+sites PDF link annotation
    • http://pemizirevubel.mywebcommunity.org/6896447444.pdfIn PDF document text
    • http://vuvulusigi.scienceontheweb.net/xoruvixise.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/5078528.pdfIn PDF document text
    • http://rolopigabetitu.scienceontheweb.net/horoscopos_profesor_zellagro_sagitario_tauro.pdfIn PDF document text
    • http://gagogepatajebe.medianewsonline.com/the_tax_collector_movie_cast.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410004/normal_5fcec05d30cbf.pdfIn PDF document text
    • http://fuxisileza.mywebcommunity.org/32252142359.pdfIn PDF document text
    • https://jevezorubik.weebly.com/uploads/1/3/4/8/134864628/2765186.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375355/normal_6049b4bfb5066.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416490/normal_600c9bb640c04.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/posaxugidut/78477593134.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eca09ffb-c0ef-4e76-bd9e-cb966026dd6a/vocabulary_builder_app_apple.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/who_makes_snapper_pro_mowers.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/65094645639.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/date_function_in_google_sheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fed0447-dd76-4de8-82aa-dd571e7e6fcf/density_practice_problem_worksheet_answers.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_off000108ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108EE 2828 bytes
SHA-256: eec2311198495a4bc353016469730966835d49679daeed18a98faa9ab15954d4
font_01_sfnt_off000112f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F8 5412 bytes
SHA-256: ee61bd0948b49eba322d92c90f070e2f847c0f274dc758f7b68cd0f53bdaca43
font_02_sfnt_off00012546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12546 10960 bytes
SHA-256: ed07d8da127bf51d3f9db2d191a929647564ac53bb8aae2e43a44db94cb3abd4

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