Malicious PDF — malware analysis report

Static analysis result for SHA-256 c81f60b6e6e22d16…

MALICIOUS

PDF

65.6 KB Created: 2020-12-05 23:46:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 35412a773414c30af18e6904191357ec SHA-1: d2c0acc1a0545533c3cdd06c3306496f16b6ba68 SHA-256: c81f60b6e6e22d16523e825ba63d6adb88d7cb40ec928998c82a6bb261986313
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 0.9995

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=anticonvulsants+davis+pdf In PDF document text
    • https://xukujeferok.weebly.com/uploads/1/3/4/4/134435440/839517.pdfIn PDF document text
    • https://ximazula.weebly.com/uploads/1/3/0/7/130738777/kemotinavexivov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381528/normal_5fbe6cc4255e7.pdfIn PDF document text
    • https://doxemikawapuki.weebly.com/uploads/1/3/4/3/134314999/7370354.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379362/normal_5f8bb44c943e9.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/5fbfceb2c14dfd36feeb11ef/t/5fc5babe3c02f22b9dd2eeed/1606793918140/dianetics_full_text.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/bloom_s_taxonomy_domains.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/92813552019.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe2f6e7acac6192a8ae0cf/1606299505268/center_the_worksheet_horizontally_on_the_page.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/magnetic_usb_charging_cable_android.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_off0000c2fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2FC 5104 bytes
SHA-256: c7b8ec46a865a0ee14a94efd230362530318ce986dc45959720fb03070195c97
font_01_sfnt_off0000d47b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD47B 11028 bytes
SHA-256: 0294efbe832225e714b71ab44a7e5af9cc2dc58e55cfe15aaface34ced713489