Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8dd79ab5a6295bf…

MALICIOUS

PDF

80.6 KB Created: 2021-03-08 23:55:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb41de93ed56b5b1de389a4031d7b7af SHA-1: dc9628abe16c8e415e77cbfcfa2e3c8c2ea2fb34 SHA-256: d8dd79ab5a6295bfc724f20bb26aab53cce3411b434f8133f9ca525cf29d9832
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, with several pointing to potentially malicious domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/strik?utm_term=la+gallina+degollada+analisis+psicologico
    • https://jumirugefof.weebly.com/uploads/1/3/3/9/133997886/setobigadutoxorak.pdf
    • https://nexudusuje.weebly.com/uploads/1/3/0/7/130740550/napejasiz_junotito_sabexuruvazujir_pinoro.pdf
    • http://jaralet.getenjoyment.net/buwuvedowefovaturefabito.pdf
    • https://puwoposujol.weebly.com/uploads/1/3/0/9/130969317/1f1a128219.pdf
    • http://vumonivaxozutod.mypressonline.com/don_juan_movie_cast.pdf
    • http://bukapim.mywebcommunity.org/rulepeg.pdf
    • https://nemoradusa.weebly.com/uploads/1/3/2/6/132682182/7b543eb069589b2.pdf
    • http://tevajevidiwa.22web.org/megaw.pdf
    • https://gixoxiri.weebly.com/uploads/1/3/4/7/134707295/nekireboputufuliz.pdf
    • https://kodopikowi.weebly.com/uploads/1/3/4/6/134659436/baladitibenigejino.pdf
    • https://zuxosudeti.weebly.com/uploads/1/3/4/3/134359900/9d2dd1236d.pdf
    • https://vasukoxenubepez.weebly.com/uploads/1/3/4/4/134475355/lokelegudafanipewaf.pdf
    • http:///C:/Users/01/Downloads/Dialnet-LaVictimologiaComoEstudio-3698900%20(5).pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/3b55731b-2802-4036-9ab3-49f2a54edbff/how_to_test_a_diode_for_continuity.pdf
    • https://uploads.strikinglycdn.com/files/ca9d603f-a7b2-4666-b4f3-8e529207a0d8/crochet_bag_pattern.pdf
    • https://s3.amazonaws.com/rawesaragegugar/image_search_apkpure.pdf
    • http://divejekojo.epizy.com/jenavomaw.pdf
    • http://vimonaker.epizy.com/enzyme_reaction_rates_worksheet.pdf
    • https://uploads.strikinglycdn.com/files/19dc8307-0f8d-4caa-b8ed-005a18c376f7/761672133.pdf
    • https://s3.amazonaws.com/muxozuvalubi/aqeedah_tawheed_in_urdu.pdf
    • https://s3.amazonaws.com/pibabopuduj/dimensional_analysis_chemistry_problems_with_answers.pdf
    • https://uploads.strikinglycdn.com/files/4c9ea2a5-51b5-4880-9788-6766ad1a723a/damusatesesadefi.pdf
    • https://s3.amazonaws.com/jojitagifuva/football_games_free_for_android.pdf
    • https://uploads.strikinglycdn.com/files/5ed13b82-a997-48e8-b681-07a04a759c41/segiwebixijexefupad.pdf
    • https://s3.amazonaws.com/domegagowevag/vulodototerok.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eefb.bin
5d353349bd00a7aaaf02960befc8b45a0459d835f6d56aa19addd0478abd7155		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFB 4796 bytes
font_01_sfnt_off0000ff4f.bin
ef537492beaf41f46c0f7bb4b4cc3f33cfb3656891628f0ba6450aeba2d3a8ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4F 11580 bytes
font_02_sfnt_off00012508.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12508 4324 bytes

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