Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6e7aef89cb186ca…

MALICIOUS

PDF

67.7 KB Created: 2020-12-17 07:31:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 4de959a4613b1ba9751eff0e254c0855 SHA-1: e70095ef1f500f9e8d721a73fcd1372aced88405 SHA-256: f6e7aef89cb186cacd3098afece154d64283caf7375f19c7ea11204012e6c106
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to reference a school dress code, serving as a lure. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://cctraff.ru/123?utm_term=perry+meridian+middle+school+dress+code In PDF document text
    • https://cdn-cms.f-static.net/uploads/4457008/normal_5fbd4145c3213.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443619/normal_5faf53e4a58e5.pdfIn PDF document text
    • https://dufamapa.weebly.com/uploads/1/3/4/3/134399252/kezunagiwusis-sejafuw-tabofadoretege.pdfIn PDF document text
    • https://bigonokefexix.weebly.com/uploads/1/3/4/5/134518339/golojamuzere.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/5fbce344be7cfc36344e8aaf/t/5fbe431e4e98326c02dc5978/1606304544046/10334301525.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc29bc888c99b6d37b22e2f/t/5fce99a32d6ace12dc5e4f87/1607375270511/24290608205.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/460538e9-b92d-4336-9081-369a48344abb/wood_mizer_lt_40_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09c894f9-4e07-4725-b53c-63eb76c3a7d3/bajigenibori.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d12e58a1-1c7f-4ed5-843f-c45bf620c5cc/ed_sheeran_supermarket_flowers_meaning.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_off0000ca9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA9A 5280 bytes
SHA-256: 320b0fe099e12b3e020f830c1d413d6e6078a9cdc8a138b8f0344cf31fab21f0
font_01_sfnt_off0000dc64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC64 11140 bytes
SHA-256: de3a02461ece64be71362aefc4fb2b1857922634ff1988da431e6794da8aa8f9