Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cb722ad0eec4b29…

MALICIOUS

PDF

78.9 KB Created: 2020-12-22 14:41:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 6968252d6baafa2dcbc49331a776e41e SHA-1: 1579245630b9c4b856fc7daccd4505763e6bd01d SHA-256: 5cb722ad0eec4b29229e3e43e0e5ff16aeec2d90453f6f9078a15fdd01d30fd5
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic firing for a malicious redirector link. The ML classifier and ClamAV also flagged the file as malicious. The presence of many external links suggests an attempt to direct users to malicious sites, likely for phishing or malware delivery, aligning with Spearphishing Attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/aws?utm_term=free+joomla+church+website+templates In PDF document text
    • https://safusubugem.weebly.com/uploads/1/3/4/6/134609944/jukogelerug.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/5eecd203-b93f-46ac-b1d1-07dffb23cab8/bojokavufupujanop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/348ae2a0-d7bf-4481-a58e-0abd692daead/crossover_symmetry_iron_scap_workout_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44101b99-395f-44df-8ebd-b1dea7d49a39/75914355844.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8be87474-2d8f-49cb-8d8d-54cee36fa759/bell_lapadula_model_vs_biba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/892cf488-d399-4d41-8424-75a7e43062ad/lukagobupetufi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55836535-3190-47b0-b673-b83ce2179be7/55165090780.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f1fd3e3-1331-4729-8b66-224db309341c/59759729140.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9688c79-da83-43d4-829f-7c66465eb826/mowel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8548a925-5079-459c-8eef-8d12bc5932a6/supasija.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0870589-cdeb-4000-ab41-ae8fa9302d2f/lenox_spice_village_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c01c3e57-809f-417e-b035-9937be1ff0b2/refukatas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/102ddeee-f128-48df-9b9c-befeee21363d/warrior_golf_balls_2_dozen_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a221e5bf-15d5-493d-91f6-1d8ba519d702/40344579348.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_off0000f93b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF93B 5436 bytes
SHA-256: 5402865c292c1fcc3177c2850e59f7eed7735032d6f22c890d5a413b2d145f7b
font_01_sfnt_off00010b9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B9B 10200 bytes
SHA-256: 41882f44db0e984678a1d9315957ff78845f18ffaaaa1c39f1d945c2fc022517

Open this report in the interactive analyzer, or submit your own file for analysis.