Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ff627e04232c616…

MALICIOUS

PDF

71.8 KB Created: 2021-02-27 19:35:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 05192ec4b8eccd1ed3edca2502f5a987 SHA-1: 9603c456377250f2a4cf61fd5672ec15df35bbb4 SHA-256: 4ff627e04232c616fb3789ec1471cae07f85e1107192e1625459b6deb9867160
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/award?keyword=how+to+fulfill+acts+of+service+love+language PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4489414/normal_60002661e7146.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500453/normal_5fc68b20a25b0.pdfIn PDF document text
    • http://lobulezinovux.medianewsonline.com/tojufuwivawosewilufogokod.pdfIn PDF document text
    • https://cdn.sqhk.co/nasubivapu/ibmUTgf/22152945687.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404112/normal_5fd64291cea85.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/hg7ujjE/ocean_raft_3d_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371783/normal_5fed10d3ac4f1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://difoduniba.epizy.com/udacity_android_login.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/altova_xmlspy_2016_professional.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/29761231376.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/resttemplate_postforobject_x-_www-_form-_urlencoded.pdfIn PDF document text
    • http://vokesakogo.onlinewebshop.net/meiosis_review_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kovibu/5229528137.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_off0000ddee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDEE 5160 bytes
SHA-256: da7fab5750cb6562991f4c971a678c11af09796403cff5cb0c1f99fb315d5e35
font_01_sfnt_off0000efaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAA 10036 bytes
SHA-256: 028afee99d42fc5d0aac05ff4b5df33120a1a03b41957cce9d9d0e52413f91e7

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