Malicious PDF — malware analysis report

Static analysis result for SHA-256 56791e4be0ca3e15…

MALICIOUS

PDF

82.0 KB Created: 2021-01-16 07:41:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 5a503a6cc7bad230c511ffabca66dd03 SHA-1: 904f25642c158d18728b4b518e137ac303073796 SHA-256: 56791e4be0ca3e15c4c8d2778d65a9487ea6b62f31ae2852abdb4a60b46ea87c
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-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/123?utm_term=sample+thank+you+letter+for+medical+referral In PDF document text
    • https://cdn-cms.f-static.net/uploads/4471082/normal_5fd2d3a09d91a.pdfIn PDF document text
    • https://gororumemi.weebly.com/uploads/1/3/4/5/134517819/1733802.pdfIn PDF document text
    • https://cdn.sqhk.co/nakunadubux/hiiiRhi/14383725279.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501367/normal_5fbeee58d4bb0.pdfIn PDF document text
    • https://cdn.sqhk.co/wefopijupe/lgc5gjo/fuwasakurizuxaparefup.pdfIn PDF document text
    • https://tabodixab.weebly.com/uploads/1/3/4/5/134585887/2546271.pdfIn PDF document text
    • https://site-1216005.mozfiles.com/files/1216005/87707939801.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366341/normal_5fd652b1b9eed.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/eq5gjT3/how_to_play_go_fish.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472213/normal_5fee40c75f06b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409806/normal_5fc400120034a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF576 5368 bytes
SHA-256: 975499b35e07dbf580723e43752abefdf2b70e665f62d652c0a56a35b6070c8e
font_01_sfnt_off00010793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10793 10996 bytes
SHA-256: 088d13df018bdfe61abdb1598ca8718ab2824ae608d0c3f8fc86eea1579cf47b
font_02_sfnt_off00012ce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE2 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f