Malicious PDF — malware analysis report

Static analysis result for SHA-256 f34e843ee4ae8891…

MALICIOUS

PDF

77.9 KB Created: 2021-02-18 17:54:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 5384ceeb701db47dc4b96d775c62b688 SHA-1: e15d456ed20b0a6c13581bb721649b2c6f893fcc SHA-256: f34e843ee4ae88915d50e91730ae276b92c781fd8e29d85c1b4f434dfdf41d9b
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, indicating a link farm or SEO poisoning attempt. One critical heuristic identified a link to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://crophysi.ru/wix?keyword=order+of+the+phoenix+pdf In PDF document text
    • https://xakirajurupani.weebly.com/uploads/1/3/2/3/132303083/lifijebovusa_vufanezesuf.pdfIn PDF document text
    • https://cdn.sqhk.co/segevenujuka/bhcV0gc/tavexozolugijapo.pdfIn PDF document text
    • http://zuvilivupeke.iblogger.org/wegapufogoge.pdfIn PDF document text
    • https://luwozupewudaxu.weebly.com/uploads/1/3/1/3/131384663/2443559.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/calculatrice_scientifique_apk_pro.pdfIn PDF document text
    • http://gaxapokone.epizy.com/vacuum_cleaner_project_report.pdfIn PDF document text
    • http://nogobixa.epizy.com/mixture_vs_compound_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/gusule/15143181873.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/al_ghazali_english.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/veguzew.pdfIn PDF document text
    • http://jatujij.rf.gd/58170258882.pdfIn PDF document text
    • http://lenawevurokolup.epizy.com/free_piano_solo_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/lalodigitoremebuvawexi.pdfIn PDF document text
    • http://famereraba.epizy.com/atrial_fibrillation_management_guidelines_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/bully_apk_cleo.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/fagevovobagok.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/mariadb_windows_10.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_off0000f8ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AB 4804 bytes
SHA-256: ce3dfdcc6dcbe3b140f4e6fd8a98a6f10d4198e3befa8c2e569d577eb4696529
font_01_sfnt_off00010902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10902 9844 bytes
SHA-256: 1d25c160aff9bb4ad2eb6a5cd9c99943c2b2a75adaf3edb581c91037261ba934

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