Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff86f8720c5742df…

MALICIOUS

PDF

70.7 KB Created: 2021-04-03 10:00:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 393729739ee36aa367883bfcc271b93f SHA-1: 167c9f44bd82df6de309f6870e8fc538418fb2c9 SHA-256: ff86f8720c5742dfc4bb805cf6d20f395075e46393e8f4ef62a1ce952169aea2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses brand-impersonation credential phishing. 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 0.9997

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
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://bepizapumi.weebly.com/uploads/1/3/5/3/135349865/sepinaxekeriwo.pdf.
  • 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://druttle.ru/123?utm_term=eset+antivirus+2018+free++for+pc PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4424024/normal_5ffcf125bef37.pdfIn PDF document text
    • https://cdn.sqhk.co/gulifunanale/ijjAogg/cosmo_and_wanda_costume_pinterest.pdfIn PDF document text
    • https://cdn.sqhk.co/lufelumad/hiPUVas/20080607250.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475729/normal_5fd84920c1cf1.pdfIn PDF document text
    • http://boxijogirexu.medianewsonline.com/vexurelulenilotovutus.pdfIn PDF document text
    • http://fogafiv.mypressonline.com/93011855850.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470839/normal_60624ca83769d.pdfIn PDF document text
    • https://bepizapumi.weebly.com/uploads/1/3/5/3/135349865/sepinaxekeriwo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393898/normal_5fcb2c043421f.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/lofese/chief_clinical_informatics_officer_job_description.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/97519149543.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/69161278048.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_off0000d6c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C3 5512 bytes
SHA-256: 5ff64bab163621bb4125677ad50ced93349412a93265c2707433b3f5fd2f916d
font_01_sfnt_off0000e99f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE99F 10772 bytes
SHA-256: ed4203aafec4e55ad98ce2414813af048d9675f66a1e2391516ef9f1db35bfb5