Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e35216c6947ab89…

MALICIOUS

PDF

77.5 KB Created: 2021-06-13 11:15:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 23a2d074b699f0dfe5d96f526e893594 SHA-1: 0391559869c41a751bb5404a17fc321786a1da57 SHA-256: 0e35216c6947ab89ee43f13eb1e1b965e91e5a2459e6c6dd213ba831b2f00771
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, which is a strong indicator of phishing or malware distribution. The ML classifier and ClamAV detection further support its malicious nature. Although no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely leading to a phishing page or a download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://crophysi.ru/123?utm_term=abbyy+flexicapture++free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4421476/normal_60207ead69c1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502493/normal_600a440ccd5d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379471/normal_6048e836bedde.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391634/normal_5fcd07f85f19f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476420/normal_6030411ce352a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486965/normal_6019dbf4d82c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481999/normal_603be66bab18a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408343/normal_6002473b743af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456119/normal_6035c6336e1bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372721/normal_5fdbf6292cc1f.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/030f2f3a-4c99-4822-bca7-0e8872e38836/78122629952.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c24d3e2-dd56-4e03-b6cc-9d9988d58358/1979_honda_express_2_value.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f77a227d-a223-4659-bf8a-4ce51a54c99b/ziziratimekipetuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b09731d0-a236-45b2-8b56-1e99ea8ec526/what_is_the_best_windows_operating_system_for_gaming.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea952fa7-faec-4fea-b0c3-d99a23027fa9/cccam_cline_software_free_download.pdfIn PDF document text
    • http://febamizilaw.pbworks.com/f/jamaroda.pdfIn PDF document text
    • http://luwapoveduvi.pbworks.com/f/21072436905.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8872ab00-c49c-4f90-b0da-468b8815098d/snow_flower_and_the_secret_fan_summary_sparknotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92dc891f-c84e-4d3e-af76-c21605305ecf/kadipomadi.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_off0000f2d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D3 5128 bytes
SHA-256: 57c0e24a04dd3080a6459b5983a10fdd7d1fc3a3466e3f1b5d7fb469bfc9aec2
font_01_sfnt_off00010469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10469 10744 bytes
SHA-256: da5e3d3974109c573ef12cc99c9426b71753e61be55ef561f6a370ab0007ce66

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