Malicious PDF — malware analysis report

Static analysis result for SHA-256 75a46b4039152ff7…

MALICIOUS

PDF

129.6 KB Created: 2020-12-21 19:48:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: dd25823e16bd0fcc935c97b6343e193f SHA-1: e7490c4cf8e33c1cdcba45873967623cd2d09867 SHA-256: 75a46b4039152ff752d496109de2f87b173085030b2f165e63ce1bd6934cf2ec
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF that contains an embedded URL, which is a common tactic for phishing or malware delivery. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates that the document likely instructs the user to open a password-protected archive, a method used to bypass security scans. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or delivering a trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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/strik?utm_term=guilty+crown+season+2+sub+indo PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369332/normal_5f8b71d7b8ca8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374188/normal_5f8d3b95d71b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374953/normal_5f8b979c7a9fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418185/normal_5faf580d188c1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463286/normal_5fca92285cf90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406223/normal_5f992532e0349.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/fosagoba/23986030409.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6e50d9ea50d41209e2688/t/5fd1ee249a9e5443ac7dc6ad/1607593509771/dentist_assistant_hygienist.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc110e9ff13940aa2409adf/t/5fcf67293fa051062b46fad5/1607427882378/mogebekadaxov.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1b1e1c89e1c4b8fc407cc/t/5fc82cd9d6e0cc37e332faac/1606954206276/ruzefibejeto.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019a53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19A53 5432 bytes
SHA-256: 1975978eb35eff61c43e98a709e592be183242f0effed7c3ad0548ffe1c2d68e
font_01_sfnt_off0001aced.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ACED 13020 bytes
SHA-256: 9fce8050975fa3560072d164d626e52b6b49ed3cc1f08ae00efb0e9794bbf759
font_02_sfnt_off0001d0c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D0C9 11840 bytes
SHA-256: 180949926b6ec776746f9de2438fba785682f2f9217ba1d3ef97839b309d2e87

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