Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1ba8257fd8107ae…

MALICIOUS

PDF

59.3 KB Created: 2020-11-28 12:41:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0f527b2d68f634e476a339345bd1d5c9 SHA-1: daf920ff0ad82bcff8aa1af770a61fe9ba1c5926 SHA-256: a1ba8257fd8107ae36a28a75bf1734b8639645849cedef1ce1843cdc990a603a
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://ggtraff.ru/strik?utm_term=london+fog+purses+at+stage In PDF document text
    • https://cdn-cms.f-static.net/uploads/4422392/normal_5f9dc3865ee82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379984/normal_5fb2c1502f8b7.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/c297aec9-fdc5-40b2-ba0b-83f6a3e57dc5/46230676557.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/zemaxavase.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1667b314-314a-4cf3-b330-41718792fbef/zasixixakos.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/65739419057.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/anti_monopoly_rules.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/73015832148.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/68347375173.pdfIn PDF document text
    • https://s3.amazonaws.com/bunobu/puditopototirebiso.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/julepabajekubu.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/understanding_business_nickels.pdfIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/ambient_display_not_working_android_10.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/dutra_sheet_metal_vineland_new_jersey.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_off0000acf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACF0 5116 bytes
SHA-256: 890d5a1a01701a051a52a4fd279c8c9d9966c5b7a8c049e54776d30e788853cd
font_01_sfnt_off0000be71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE71 9992 bytes
SHA-256: 983ffec4b13854e4a9ad9d37bd8e0e1358d3fb95492bae4be76cc90fbab3d126