Malicious PDF — malware analysis report

Static analysis result for SHA-256 555b3cff76b2bf3e…

MALICIOUS

PDF

73.9 KB Created: 2021-02-04 11:12:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 0cea38999bf53f6f67cdaacd521967b5 SHA-1: db23595a86dd20d6c70c86cd33034a3502682823 SHA-256: 555b3cff76b2bf3ed9ca2e5380e1cf8f4402d1f2e86f31bae44809991d1da36e
136 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics, including a high-confidence ML classifier and ClamAV detection. It contains numerous embedded URLs pointing to potentially malicious domains, suggesting a phishing or malware distribution attempt. The presence of 'LOLBin token sequence' and external URI firings further supports this, indicating the document is designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://jacksth.ru/wb?keyword=spirit%20of%20the%20caribbean%20movie%20tamil PDF link annotation
    • http://prizinsta365.website/human_sexuality_diversity_in_contem7xd18.pdfIn PDF document text
    • http://study-english-04.space/dsssb_je_notification_2018yv106.pdfIn PDF document text
    • http://vvvvvvvvvvvvvvvvvvvvvb.xyz/74445561686id84e.pdfIn PDF document text
    • http://app-3null.com/gugibaxepesq1yd4.pdfIn macro / runtime command snippet
    • http://robot3.site/pixowalukofugumenamuttw.pdfIn macro / runtime command snippet
    • http://copyrightreports.com/isometric_paper_template_a42x1qy.pdfIn PDF document text
    • http://lumacy.site/95594168102gk2yz.pdfIn PDF document text
    • http://bigno.space/vendedores_perros_librof64bh.pdfIn PDF document text
    • http://djami.ru/zagubexa9tu1p.pdfIn PDF document text
    • http://lisolu.org/lyft_driver_account_deactivated57ek2.pdfIn PDF document text
    • http://autoupgrade.website/naviextras_update_code60u32.pdfIn PDF document text
    • http://fastpysystem.online/fallout_4_fusion_core_codel3q52.pdfIn PDF document text
    • http://vvvvvvvvvvvvvvvvvvvvvb.xyz/74445561686iIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xisefowu/foguzomitunatoko.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/54557537548.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/wrist_curl_form.pdfIn PDF document text
    • https://s3.amazonaws.com/bagokiko/48470338071.pdfIn macro / runtime command snippet
    • https://s3.amazonaws.com/mawesenasijoser/arduino_uno_r3_starter_kit_projects.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/lubapivapuminesexodofe.pdfIn PDF document text
    • https://s3.amazonaws.com/wolawatin/ios_affine_transform_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/kinokawitewim.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_off0000d464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD464 5168 bytes
SHA-256: 602f9ddc16b17e0469440fb7839a0e375696d909227e832742b9be5c1612b79e
font_01_sfnt_off0000e5c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C0 11692 bytes
SHA-256: 20eb71ecbedca033931db7060625e46d93001aa663e2dbac1dc3b0a6f9f1f158
font_02_sfnt_off00010c36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C36 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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