Malicious PDF — malware analysis report

Static analysis result for SHA-256 610c3098aec80eba…

MALICIOUS

PDF

76.1 KB Created: 2021-03-29 09:57:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9ee84d49b30b0f00c515e704ec66a89 SHA-1: 1389360683117a22163d9488597c35207e236ef5 SHA-256: 610c3098aec80eba52f92884ac13ada836560957a9cfb74d5f1b03e4f8a229ce
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains multiple external URIs, with a prominent one leading to a download disguised as 'Dream league apk 2021'. The PDF structure and embedded links suggest it's part of a link farm designed to redirect users to malicious content, likely for malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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://dafemum.ru/wix?keyword=dream+league+apk+2021
    • https://static.s123-cdn-static.com/uploads/4487424/normal_5ff65195c942b.pdf
    • http://pexulisinipev.sportsontheweb.net/the_oxford_history_of_islam.pdf
    • https://botabire.weebly.com/uploads/1/3/4/6/134629411/c8dfb286.pdf
    • https://cdn.sqhk.co/gawukale/fhhhhhj/saguxumorepivesimep.pdf
    • https://lonawapusar.weebly.com/uploads/1/3/0/7/130776864/mamejofajabu.pdf
    • https://sujarusokebukok.weebly.com/uploads/1/3/1/4/131437349/3559819.pdf
    • http://sosuziba.mypressonline.com/54351941751.pdf
    • http://baliferifopiz.mypressonline.com/learn_autocad_free_online.pdf
    • http://jalojewaga.mypressonline.com/vepudenozulevufubaramu.pdf
    • https://static.s123-cdn-static.com/uploads/4477400/normal_5ff33e3a8aab5.pdf
    • https://cdn-cms.f-static.net/uploads/4447640/normal_60388a6b98328.pdf
    • https://cdn.sqhk.co/vakamuzawa/dOiiijb/integers_class_6_worksheets.pdf
    • https://cdn.sqhk.co/nedabuke/ivmhdxw/xozasixomir.pdf
    • https://cdn.sqhk.co/fovuxugo/ishdkha/frantics_game_review.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://3796e7af-74f6-4269-b4b1-c98d6d9a2df3.filesusr.com/ugd/169b5e_8b17cac1d3b847568364205646f555ce.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f52db20c-f0d1-4800-89d7-1c7478d8288d/wuzolofor.pdf
    • https://uploads.strikinglycdn.com/files/5f1b4927-96a6-4eca-9f9f-92947cba0964/cronica_de_una_muerte_anunciada_resumen_capitulo_3_y_4.pdf
    • https://329f26c8-0235-4118-8622-173d264d9cf1.filesusr.com/ugd/221f3a_161b8a8cc02e445bb3138498ee190ce8.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9ab9e84f-c61e-47ca-b6f4-cd52c3e06812/uncle_iroh_pai_sho_rules.pdf
    • https://b304dada-1952-41b2-af44-d16a3232bb3f.filesusr.com/ugd/c19c34_46d5e1106f004e719470bb0659a2c2de.pdf?index=true
    • http://pudugivifo.myartsonline.com/abbyy_transformer_12_free.pdf
    • https://uploads.strikinglycdn.com/files/52a7f94e-629e-4680-ae3d-36ed0c708832/58476366350.pdf
    • https://uploads.strikinglycdn.com/files/0140f24d-b684-4ff5-8ac6-9d83dc6da8f5/rufapuvofafow.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea40.bin
84d591bf2ff7b581df0191c01ae4b05798e551fbd59e2f5d3efaa7ec0dee785f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA40 5352 bytes
font_01_sfnt_off0000fc67.bin
4c4c53a60526c67fe62784ec78dcb1da6c560c303eb346dfd24fdff1d0427bff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC67 11852 bytes

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