Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a0f833960588354…

MALICIOUS

PDF

74.5 KB Created: 2021-03-08 11:43:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 13f0877bd8df6f3669ad55d2f06b7527 SHA-1: a24dbac4da0373977b565c7217c4399123dcd57a SHA-256: 6a0f8339605883544358b341f36f3e03deb482d17ca8bacc7777c5caea3a20bf
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The presence of numerous external links, particularly to a URL associated with a 'london value investing club', suggests a phishing or content distribution scheme. ClamAV also detected it as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://bologen.ru/strik?utm_term=london+value+investing+club PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4529977/normal_60385710af1af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496005/normal_603e4b4d2ea12.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445119/normal_5ff12140e9afb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472501/normal_600fce41eb889.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413240/normal_6037bf3f7a6cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469370/normal_6039da419464f.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/61dcd50f-ab04-4e1e-8ba8-9908afc3906f/prophetic_intercession.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/simmons_oneview_ufc.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/32052016417.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/minecraft_launcher_free_cracked_1._8.pdfIn PDF document text
    • https://72cdfa97-b5fe-44cc-9aa9-3142b5aa642a.filesusr.com/ugd/ee32c9_6e0fb3ebb3e945f78004e6d4c117b7e6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce577e3d-3665-48ef-b4eb-1945ccc87e2a/heil_dc90_furnace_blower_motor.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/ikea_bureau_informatique_bois.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/chevrolet_aveo_2006_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/018218f2-e6ef-47d7-a055-a7e4c4f46a52/ximatat.pdfIn PDF document text
    • https://45e41439-46a4-4c97-84f0-155cfeda4cef.filesusr.com/ugd/9d7ad9_94f47f592f174e679499f6656f08ec49.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/rest_api_performance_testing_using_postman.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/11013074153.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72c05340-940c-4a63-9fce-35f83c3d9bd7/blood_bowl_2020_rulebook_download.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_off0000e8c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C7 5152 bytes
SHA-256: 3b44dbfc7c29bcdeb6ee4bbdf1b65bad11796d1ac271d5ebdad80555c478a9bc
font_01_sfnt_off0000fa6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6D 10220 bytes
SHA-256: 3091d5a01468a46748f8c47d813c284edc31961f778c8f9374a219bcb63ce673

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