Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b2bd211432a2407…

MALICIOUS

PDF

109.1 KB Created: 2020-11-17 15:02:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 67722ef3a1a4bf55f78f5800124fd41b SHA-1: 84a1c6e9e37c3e5833cfb630884b432258d9a89c SHA-256: 8b2bd211432a24073d8fa8564b11537307464b96be9db87329f71234de04526a
136 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains an embedded URL pointing to a suspicious domain, likely intended to host malicious content or redirect the user. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass security scanners.

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://traffset.ru/aws?utm_term=auditoria+informatica+vulnerabilidad+de+los+sistemas PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365555/normal_5f88fbe83fc49.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/9e0f8320-7f2a-4594-bbf9-7d5e7ff14c55/crore_to_million_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da3e7c22-283f-42fb-b00f-2e00d7963796/free_ringtones_for_t_mobile_phones.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/5855937196.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4352e7a4-d79a-42ca-8aed-81f8658c173f/comac_Chine_c919.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47469959-5b60-4d72-ad11-d136a9e0c2d9/45859916624.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/indigenous_materials_in_the_philippines.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/depo_medrol_drug_information_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3d449a1-ef29-4051-abaa-f889b2a6c00b/81317162987.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6eb12b26-61be-4007-ba71-d1090a0fb6b6/pinoy_movie_channel_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/zillow_homes_for_sale_new_hampshire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdbb2700-ef49-42ff-935b-6e1ee4d7833b/xefimid.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/arthritis_research_uk_neck_pain.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_off00016ac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16AC9 5356 bytes
SHA-256: 01178f7333ee32a1a9994c0b5eb41380d1b85bb270c9c83eeaa5fc47b51c0cda
font_01_sfnt_off00017cee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17CEE 12248 bytes
SHA-256: b68d2b50607fd170d25246c31b0ea24a3de5a3251b561c5d9b21b655e1f54eed

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