Malicious PDF — malware analysis report

Static analysis result for SHA-256 93c8a14d45469fb5…

MALICIOUS

PDF

70.4 KB Created: 2021-01-04 17:56:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 3e023b1953f70ea8c57365b4e6faced9 SHA-1: 7957a8099010e76dd63ea53b31e3106f817dc9c4 SHA-256: 93c8a14d45469fb5269fea1f5836af68db1ba39474420dbd825fe565475a1dea
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with several pointing to known malicious redirector infrastructure and link farms. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites.

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://traffking.ru/123?utm_term=initiative+system+dnd+5e In PDF document text
    • https://febotobelem.weebly.com/uploads/1/3/0/7/130739539/rekimitirivasi-dezosinoser-dapebajose.pdfIn PDF document text
    • https://nofawubepugo.weebly.com/uploads/1/3/4/3/134373843/1897356.pdfIn PDF document text
    • https://naroxelilokatud.weebly.com/uploads/1/3/1/3/131384214/eff4a21a499a3.pdfIn PDF document text
    • https://vapaniwagivu.weebly.com/uploads/1/3/4/4/134442769/7005342.pdfIn PDF document text
    • https://munopufunorari.weebly.com/uploads/1/3/4/8/134881547/nolil.pdfIn PDF document text
    • https://guxewegitonis.weebly.com/uploads/1/3/4/3/134336720/pamixo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415770/normal_5f94af0bb1379.pdfIn PDF document text
    • https://gatilavim.weebly.com/uploads/1/3/4/3/134391542/8493097.pdfIn PDF document text
    • https://dapinolun.weebly.com/uploads/1/3/4/7/134762022/3eee1b6.pdfIn PDF document text
    • https://kaperimivegorew.weebly.com/uploads/1/3/4/3/134371305/sizasusezikovola.pdfIn PDF document text
    • https://dopijixofovaje.weebly.com/uploads/1/3/4/6/134692352/7939915.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/tobobowu/dark_cosmic_lux_vs_elementalist_lux.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/skyrim_night_eye_fix_enb.pdfIn PDF document text
    • https://s3.amazonaws.com/potevip/vw_golf_gti_manual_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/62797286149.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/16360196399.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_off0000d63f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD63F 5064 bytes
SHA-256: 7c64b92cdabe959d04020877121e7295fbd28de2aff98ea1cbc5fe58fc4d9103
font_01_sfnt_off0000e77d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77D 10496 bytes
SHA-256: 41db35597f10b5addc534a569d36e5d53a56c150a87686c18b588a1c6f0e0a3b

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