Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8a4cbaa3c5ddbbd…

MALICIOUS

PDF

66.9 KB Created: 2020-11-09 19:13:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 2b61210457b74bf6f4bed70414996f04 SHA-1: 30de269399b87d373b4fe37a41cad8d7e092d372 SHA-256: d8a4cbaa3c5ddbbd396c226273dab25755422320d445aaacd20cb0a178fffdcf
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely contains instructions to open a password-protected archive, a common tactic to evade gateway scanning. An external URI pointing to 'traffine.ru' was extracted, suggesting a download or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffine.ru/123?keyword=zip+to+apk+file+converter PDF link annotation
    • https://gizojobov.weebly.com/uploads/1/3/4/4/134436228/7449095.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/sijuwoxujupid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403807/normal_5f94cdda158f2.pdfIn PDF document text
    • https://nutefowamedez.weebly.com/uploads/1/3/4/3/134330341/tuvilefit.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/763a75ab-b512-4c30-ba68-15e086d40612/wexizaxebukolowubebosi.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/linemixazigir.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/rixazajawekobodunumofaje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05f70b83-6950-4b6b-b723-ebd56989fdd2/caracteristicas_de_la_capa_4_del_modelo_osi.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/biology_book_for_class_12_up_board.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1606b2c-7e73-4d12-be47-8046fe44c652/jofujijinelajaxeros.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_off0000ca10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA10 4912 bytes
SHA-256: 7e97de77aea59b2da2f58038b9de8956bc7cf8cf48e7544029833020132e489f
font_01_sfnt_off0000daef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAEF 10500 bytes
SHA-256: b9339761bb3296e13facefde75e662eb020a2934293570bba92a79355687705a

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