Malicious PDF — malware analysis report

Static analysis result for SHA-256 646bd8be2048a971…

MALICIOUS

PDF

83.7 KB Created: 2021-03-20 00:57:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 33105049688146d726c848dc70c17c74 SHA-1: c4d9d76fae61220061aa407f85f8acd8c1f28a16 SHA-256: 646bd8be2048a971b9f7aa5f2e3da41e8b7512061c1750597b2f8d8783b5b112
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://zajinet.ru/award?keyword=buzzer+12v+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4470027/normal_5fed129d0eb4d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413243/normal_5fdf46a17b28d.pdfIn PDF document text
    • http://zebakabum.iblogger.org/1st_birthday_invitation_card_templates_free.pdfIn PDF document text
    • https://cdn.sqhk.co/xumununuriz/dhgGgee/83280491591.pdfIn PDF document text
    • http://shopmzm.site/coefficient_of_performance_calculator6cge4.pdfIn PDF document text
    • http://bnatural.space/wemofuromifagegi7qa2z.pdfIn PDF document text
    • https://cdn.sqhk.co/silutoge/YDmnSP6/survival_zombie_survival.pdfIn PDF document text
    • http://thelandofbadideas.com/79158564033xd215.pdfIn PDF document text
    • https://cdn.sqhk.co/gotirawuz/BheW5ib/sekawiloza.pdfIn PDF document text
    • http://adv-workshop.site/bibanajagokosixivef1dyit.pdfIn PDF document text
    • http://onlinekartiadesi.com/91415178180uqa5c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454180/normal_5ffc9f50d73cf.pdfIn PDF document text
    • http://bukejasinopa.22web.org/24941129361.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/dazuxujepov/68536616154.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/food_diary_template.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/isometric_paper_a4.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/ar_reading_practice_quiz_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/bootstrap_modal_file.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/polygon_worksheets_grade_3.pdfIn PDF document text
    • http://dogufisojorosef.epizy.com/importance_of_communication_channels.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB10 3232 bytes
SHA-256: ebdb59fcbcec9182fb9919c322e8a34044726b51fc536df9148b86bd5cc161c7
font_01_sfnt_off0000e699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE699 4960 bytes
SHA-256: 9776f4fd62091a4d7eae62850466b05b893e11565c4cda0fa94dbba6fe0c6bf9
font_02_sfnt_off0000f7a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A7 22116 bytes
SHA-256: b095e1f13b2da3c1288e9a1e0103fa87fcc5a91f4621ed05beed3e0b2e4c4a45
font_03_sfnt_off000129fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129FD 16260 bytes
SHA-256: d25a34a56be33791b66bd7dbe91ee772b39b89bee75ba0e64ef3ea6cb2c10b57

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