Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e3ec187a128a29e…

MALICIOUS

PDF

80.8 KB Created: 2021-03-10 23:28:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 10f94c99ff080cb2ff5f130e3499bff6 SHA-1: b653ea976dbeca7cbdb2c00d71e732a1ff9de185 SHA-256: 6e3ec187a128a29e19a8f55e8fc1ac5e107110b973badf606e764596ce38519b
184 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, many of which point to known malicious redirector infrastructure. The document body, though heavily obfuscated, suggests a lure related to a 'printable emergency contact list template'. The presence of multiple links on disposable hosting and the ML classifier's high confidence score indicate a phishing or redirection campaign. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dafemum.ru/123?utm_term=printable+emergency+contact+list+template In PDF document text
    • https://static.s123-cdn-static.com/uploads/4372371/normal_5ff64fb8643a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484358/normal_5fcf7ac8dca2a.pdfIn PDF document text
    • http://nnorm-id.com/93778179359lwqbm.pdfIn PDF document text
    • http://legendbilisim.com/vimokujuer.pdfIn PDF document text
    • http://nebo-baikala.ru/scarlett_2i2_pricer9rjc.pdfIn PDF document text
    • https://vidiguwases.weebly.com/uploads/1/3/4/3/134347373/ad8348c57eb46.pdfIn PDF document text
    • https://tenekitu.weebly.com/uploads/1/3/4/0/134018212/cf339fa987eafd9.pdfIn PDF document text
    • https://nusepetuvake.weebly.com/uploads/1/3/3/9/133997573/632545.pdfIn PDF document text
    • https://jonimewogil.weebly.com/uploads/1/3/1/8/131860125/topepomilu-zoxatijape.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444115/normal_601fd4a6da983.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417315/normal_5fd7c77bcf377.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488332/normal_6040eaaad1983.pdfIn PDF document text
    • https://xelegiri.weebly.com/uploads/1/3/4/4/134435730/a0beadfc1dec.pdfIn PDF document text
    • http://vinnipoh.fun/shark_vpn_premium_apky24hm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367017/normal_602e5c4ccd9e8.pdfIn PDF document text
    • http://goodsun.space/velocity_and_acceleration_problems_worksheet_answersm7vpc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456999/normal_5ff6963c23828.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416514/normal_5ffd13e312755.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455681/normal_603f92d577bd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459654/normal_601368b09b60e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tukutuxobolekub.epizy.com/39350427582.pdfIn PDF document text
    • http://xagewozutuke.epizy.com/data_analytics_beginners_guide.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_off0000ff9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9B 5496 bytes
SHA-256: d31992ca5548560a9b779dd5003cca2871ecd42552816bbd46b68fb903a4bfaf
font_01_sfnt_off0001123d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1123D 10336 bytes
SHA-256: d05d8e0eaff97390b68e6e69741b590a7b12e4ce4763ab3a1b6b64d496b207f1