Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ab2a756d2bc60d0…

MALICIOUS

PDF

68.0 KB Created: 2020-12-03 00:20:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: bb45eec9037c0cc5d18babd1a9867984 SHA-1: 13c7f51370aad2cde1a0c8dba1df41707037feef SHA-256: 8ab2a756d2bc60d06219df1c0f7ae1024b6c4d7b47552ebee61a20e56d23c11f
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 0.9997

Heuristics 4

  • 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.
  • 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://cctraff.ru/aws?utm_term=satsuma+high+school+uniform+policy In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382778/normal_5fb6d922e77ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379482/normal_5f9d9b5c630d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408871/normal_5fc1a1664e1a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366347/normal_5f93517e44b89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481518/normal_5fc0c7056fd3b.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/sikuva/66468152498.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2836779-b154-44c1-ba8b-0d348add6d44/manual_para_una_comunidad_escolar_segura.pdfIn PDF document text
    • https://s3.amazonaws.com/xebareto/jawoveb.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/gta_5_cheats_xbox_one_unlimited_money_number.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/apple_flash_notification.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/beden_kitle_indeksi_forml_nedir.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_off0000cd03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD03 5632 bytes
SHA-256: cdbcd9bf1a701dd9408538d70d10503268f0a9d5110368403c6bb7b749dd2814
font_01_sfnt_off0000e00f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00F 10312 bytes
SHA-256: 2cdc306a87367272de4e6a5163b4e9cbb27fb67e7b126615bbebb7b94c88fe53