Malicious PDF — malware analysis report

Static analysis result for SHA-256 b019baa5683c5046…

MALICIOUS

PDF

75.7 KB Created: 2021-01-11 10:47:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a08ab18d6c8c8f79a32200533280b4c5 SHA-1: 4da3a9cb6aa8c820842b0120f5a8ed11a99e8445 SHA-256: b019baa5683c5046ee68e9d5272c76f8b846b0e0e679b2e918e921d588b744c1
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 0.9998

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://gettraff.ru/aws?utm_term=3ds+max+learning+pdf+free In PDF document text
    • https://cdn.sqhk.co/wuvidomanale/ibIdGNm/43067240156.pdfIn PDF document text
    • https://cdn.sqhk.co/nagigureti/cghaczd/32509347813.pdfIn PDF document text
    • https://cdn.sqhk.co/damukowabij/jiixeig/free_hearts_app_for_ipad_calculator.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/3azOKfT/spirit_riding_free_characters_and_horses.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425483/normal_5fc82c4f359a6.pdfIn PDF document text
    • https://cdn.sqhk.co/zixajofazadi/kihRwjh/business_operations_manager_job_description_uk.pdfIn PDF document text
    • https://site-1178182.mozfiles.com/files/1178182/6899390292.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502833/normal_5fe874d8c75c3.pdfIn PDF document text
    • https://cdn.sqhk.co/susiwozobo/zbheSB5/67333275103.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421354/normal_5ff47c071f2cc.pdfIn PDF document text
    • https://cdn.sqhk.co/dobexesi/XkBhijj/88349057607.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411701/normal_5fb994ef8127f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409107/normal_5fa39f90d7af5.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/tigewibejageju/24332342340.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_off0000ed05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED05 5500 bytes
SHA-256: a3f9098268138affbe624da789f694619835c71650a30db613c38c9d23be23ac
font_01_sfnt_off0000ffa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA5 10124 bytes
SHA-256: ca9e3e4ff39b4f170fd4842ae470ab69c116a97922ca72d641d3b9687f22094f