Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f89cb84718414ba…

MALICIOUS

PDF

78.6 KB Created: 2020-11-11 00:51:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 78672a2ef6492cfcdb65143c19be96c9 SHA-1: d4c2b0ad412709fb8f942985c7653452d39e6322 SHA-256: 1f89cb84718414ba0b63a8b60ae9aa12836eab8b9961e4f4bb19d01d22d8cfec
214 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, specifically flagged for linking to known malicious redirector infrastructure. The embedded links suggest an attempt to direct users to phishing sites or download further malware. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to exploit users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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?keyword=warranted+superior+saw+age In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383699/normal_5f9d7c508def7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410956/normal_5f9619d2d58ce.pdfIn PDF document text
    • https://wajatajosow.weebly.com/uploads/1/3/4/4/134487766/juvevojed_felexef_nixediwixamat_wavilowibu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366676/normal_5f8b6b87c3a30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384647/normal_5f941e820cc40.pdfIn PDF document text
    • https://fejilezujew.weebly.com/uploads/1/3/4/3/134340931/dubuwexudofigos-sonesel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369905/normal_5f88f9d97b761.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389576/normal_5f97a27231326.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/najob_tefuzogi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/814e2e5f-2b47-46b9-a77e-dca96e61933c/nojodoverizekosadule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/238de471-1f20-4675-8b28-daf8a0331d0f/fina_logo_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d0eeafc-3ea4-4b9e-a435-5be9ad9d3a4d/african_natives_having_sex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/216601c9-a515-4418-8e08-e7c0acceec59/33186883631.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_off0000f949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF949 5200 bytes
SHA-256: c12f962b226b44745e22d0e5e45586850d6e692503f44380d43eeeb685785baa
font_01_sfnt_off00010b21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B21 10088 bytes
SHA-256: d651af3c01e8a3d64cfbd74e46af6aa253ac3c092db4df52006e1f6e9e52ff19

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