Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d86c6268b8ee269…

MALICIOUS

PDF

70.3 KB Created: 2021-02-27 23:37:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 861a1f0a5f8a5020f448d2d876a6983b SHA-1: d4f101f5f6d35ee0e32180d4b0a13ed30253bf1e SHA-256: 2d86c6268b8ee269a90850189bed80483cc9e451fbe4aff9779f2553558b9337
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The primary purpose appears to be redirecting users to potentially harmful content hosted on these external URLs.

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://nipisod.ru/aws?utm_term=what+does+favored+by+god+mean PDF link annotation
    • https://neverazu.weebly.com/uploads/1/3/4/9/134901342/46ad74dfca.pdfIn PDF document text
    • https://duvokazi.weebly.com/uploads/1/3/4/1/134108747/kojexafulobewup.pdfIn PDF document text
    • https://vesizolakaz.weebly.com/uploads/1/3/4/3/134333528/1190727.pdfIn PDF document text
    • https://gejizataki.weebly.com/uploads/1/3/3/9/133997606/2036087.pdfIn PDF document text
    • http://niburufajanuto.sportsontheweb.net/91358411892.pdfIn PDF document text
    • https://radigaligoled.weebly.com/uploads/1/3/4/3/134333621/49e80e6.pdfIn PDF document text
    • https://rativebexatu.weebly.com/uploads/1/3/2/3/132302992/cf03ef07d38.pdfIn PDF document text
    • http://beviluxenumiliv.mywebcommunity.org/sony_wireless_headphones_mdr-rf985r_parts.pdfIn PDF document text
    • https://sepuzudagek.weebly.com/uploads/1/3/5/3/135329554/kepeveji-wopuwagin-zetuniz.pdfIn PDF document text
    • http://lizoguxumugef.mywebcommunity.org/defojen.pdfIn PDF document text
    • https://lapawiniposa.weebly.com/uploads/1/3/5/3/135323982/5125065.pdfIn PDF document text
    • https://finijigif.weebly.com/uploads/1/3/2/6/132681422/nexevojiwirasedidozo.pdfIn PDF document text
    • http://gemubanabugawa.mypressonline.com/fifty_shades_darker_full_movie_2018_nbc.pdfIn PDF document text
    • https://zidesefaw.weebly.com/uploads/1/3/2/6/132680856/teginasagijojo_funedotun_rujisoluloxi_mamamadaj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lumosaneja.onlinewebshop.net/20130750561.pdfIn PDF document text
    • http://zevusup.atwebpages.com/19203788507.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_off0000d736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD736 5604 bytes
SHA-256: 8787a5af572aa3d48b2541a21ebbefb3dfa5433cd7cf9e20d39fd2b7aaceb140
font_01_sfnt_off0000ea39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA39 10024 bytes
SHA-256: 265bd657f6f4a10d3cf4567b6e0d250fd19335c68da3d5cc6c59d0b7e7db3598

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