Malicious PDF — malware analysis report

Static analysis result for SHA-256 4623e4af44c27dcc…

MALICIOUS

PDF

113.4 KB Created: 2020-12-19 12:47:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d222fdf7c8ede1e56b141869c853d1ab SHA-1: d7476c7b2d61a1efa462e8a84fcc836dbaf1086f SHA-256: 4623e4af44c27dccfb01511b44b30bbe42c593c1cd0f47489435af6f35f2b287
214 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is a malicious redirector and a lure for recovery secrets or private keys. The embedded URL points to a known malicious redirector. While no scripts were explicitly extracted, the nature of the heuristics suggests an attempt to phish for sensitive information, likely through a malicious link or embedded exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://traffking.ru/aws?utm_term=citation+report+format In PDF document text
    • https://cdn-cms.f-static.net/uploads/4386620/normal_5fa757db707e7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451766/normal_5fc4230ad792c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc512d3ff13940aa25a72a5/t/5fd0fa6bf441661decfb9f20/1607531116652/24567765777.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/tafirazijatitopufevufet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc9c274a508b35dd5dc321/t/5fdd18d3306ce07768b1433c/1608325332051/binding_adapter_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28d6f3b4-650f-4561-b8a8-4883db381480/moral_reconation_therapy_workbook_pd.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf50673f75b16643cbbcbf/1606373479749/nazifusajizugisur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcf322d0-baa3-49fb-9bea-cf38aa82b5db/zikora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7bf2cd2-4103-4ef7-bb17-3761658615aa/the_conjuring_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/grilled_pork_chop_calories.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001711b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1711B 3364 bytes
SHA-256: 56506cec1a6424566de35c6c74b8ba6d1ecabc5dbcb10ae242be2300f233a7cb
font_01_sfnt_off00017d1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D1B 4744 bytes
SHA-256: 84d7e8e22f28ef8fc74d3c26ca587c6165e33f1e644e05e7d887f69923dcc442
font_02_sfnt_off00018d25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18D25 13868 bytes
SHA-256: 531159c85433681cde39f4edff3685b71725f056b3feadab1fd6141c4ba092c9

Open this report in the interactive analyzer, or submit your own file for analysis.