Malicious PDF — malware analysis report

Static analysis result for SHA-256 faf7aca9af1a4efa…

MALICIOUS

PDF

76.4 KB Created: 2021-04-04 16:47:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7362208d01381cba7ffd0650c130ef8d SHA-1: 828b975925afe9731364022e0ec64ccdbaa13549 SHA-256: faf7aca9af1a4efa9432c6d9a2785e2fb5925f1f0b924d40259c75dbf430218a
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 threat. It contains a large number of external links, suggesting it functions as a link farm designed to redirect users to potentially malicious websites. The presence of multiple SEO-related heuristics further supports the interpretation that this document is part of a scheme to manipulate search engine results or distribute malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://kuzutuzo.ru/wix?keyword=assassin%2527s+creed+apk+download+free PDF link annotation
    • http://fajiriduxir.medianewsonline.com/prefixes_and_suffixes_worksheets_5th_grade.pdfIn PDF document text
    • https://pitejuxupukure.weebly.com/uploads/1/3/4/5/134500798/7011684.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406482/normal_606916fedfaeb.pdfIn PDF document text
    • http://lopixerirerenex.mywebcommunity.org/structure_and_functions_of_proteins.pdfIn PDF document text
    • https://nizuwutino.weebly.com/uploads/1/3/1/4/131482859/virowuto.pdfIn PDF document text
    • https://wenabavur.weebly.com/uploads/1/3/1/3/131379405/8820763.pdfIn PDF document text
    • http://kakafeg.scienceontheweb.net/monitorear_red_wifi_windows_10.pdfIn PDF document text
    • https://gonibulurigudum.weebly.com/uploads/1/3/0/8/130874364/2871f8cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373509/normal_600b3e4b44aee.pdfIn PDF document text
    • http://jukekelexoseda.22web.org/have_yourself_a_merry_little_christmas_original_song_lyrics.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376621/normal_5feedff397752.pdfIn PDF document text
    • https://jufufowepum.weebly.com/uploads/1/3/5/3/135348100/rikexotodiwake.pdfIn PDF document text
    • https://zabamatuli.weebly.com/uploads/1/3/4/3/134348910/ludivi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gikikojumikobep.epizy.com/84993361397.pdfIn PDF document text
    • https://a86a6b26-b473-4b55-b9aa-7628a2bff077.filesusr.com/ugd/4f270c_91af06e62cbf4ada83a81a242a9a97df.pdf?index=trueIn PDF document text
    • http://togipumenotu.epizy.com/zevabinugurugoz.pdfIn PDF document text
    • http://kuzemepusiloj.onlinewebshop.net/silent_letters_in_english_exercises.pdfIn PDF document text
    • https://901c4554-6fda-40bf-8344-1f1538f5dc06.filesusr.com/ugd/a76634_99d5cf87efb24cc582767f3bb5980267.pdf?index=trueIn PDF document text
    • https://fa53e508-d88d-41cb-897c-7a5b6f1bfcc3.filesusr.com/ugd/361045_01b2d93976f2488d82fed0fc9217a28e.pdf?index=trueIn PDF document text
    • https://eee5dff6-7331-416e-acdf-593d0c386862.filesusr.com/ugd/21e9e0_843a1df206c149389bcad0893ff0f1c4.pdf?index=trueIn PDF document text
    • http://jonesojawu.myartsonline.com/wenepelenosikiralibesek.pdfIn PDF document text
    • https://4eb83289-b313-4542-b68c-79a1d4783db4.filesusr.com/ugd/f6336d_52ee0b6cb78d406da91a050c9f4bfab2.pdf?index=trueIn 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_off0000ebbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBC 5328 bytes
SHA-256: b5cff77091ea54d907c61ded3c5cad8f9992dcc51db25618953672ec3fc51bf4
font_01_sfnt_off0000fe09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE09 11160 bytes
SHA-256: 6c46949851b1493755541d7bbba2c9e9d4859729159ea76ccf757eb87570b35a