Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ac5e106ac1148e2…

MALICIOUS

PDF

68.6 KB Created: 2021-02-16 02:05:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 84c8e155bccfa94c8a058197985a6c92 SHA-1: 5d872e574acefd77d9f104c30521fa9461686704 SHA-256: 1ac5e106ac1148e2de7c7412486b3365b7203a6e36f468ad5d67804ea394e275
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://yafferge.ru/wix?keyword=mineirinho+clarice+lispector+pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4418166/normal_5fc6f1705f6bb.pdfIn PDF document text
    • https://bogonifad.weebly.com/uploads/1/3/4/1/134108647/ea2bdb92d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470828/normal_60289a9e5d589.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417669/normal_5fc7f20b53c9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479223/normal_6029726024ecd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500183/normal_601243b989905.pdfIn PDF document text
    • https://rafunipigadim.weebly.com/uploads/1/3/1/3/131380466/8626232.pdfIn PDF document text
    • http://klosheff.xyz/lenumuluvufitobepurewqtsw.pdfIn PDF document text
    • https://zomudefe.weebly.com/uploads/1/3/0/7/130740133/925470.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405194/normal_601796e438127.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413976/normal_5fd08d426a88b.pdfIn PDF document text
    • http://about-igsupport.com/98366953453z8ttl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446401/normal_5fd1c466380ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367687/normal_5fef14ae74fb0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378410/normal_5fee7d8fc9d87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492588/normal_5fe8ad6b8a6eb.pdfIn PDF document text
    • http://detonic-italy.website/4320751972047hg3.pdfIn PDF document text
    • http://salea.site/493991274slzx9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401538/normal_601462f50cc59.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d0fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0FD 5248 bytes
SHA-256: 7ef560b610600aec5c2b83d19c008fb7738c761ca8f77de28211bf8abbd646fa
font_01_sfnt_off0000e2de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DE 10136 bytes
SHA-256: 7cbc53d936e23e6efad1e53e91268edc50d81bbee79eac904ee8cc6a23758d20