Malicious PDF — malware analysis report

Static analysis result for SHA-256 2710008b88ff2ff7…

MALICIOUS

PDF

93.6 KB Created: 2021-03-18 21:47:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 6dd6450bf639ef9f37b2bb8bb26568f6 SHA-1: d3ed826d324268d8755555539386679702cdc39c SHA-256: 2710008b88ff2ff7b2d70a2b88d9af488e1219773552b495968bd68d619641e8
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with a primary suspicious URL pointing to 'resalured.ru'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is part of a link farm hosted on disposable domains, further suggesting a malicious intent to distribute or redirect users to harmful content. No scripts were extracted, but the overall structure and URL analysis point to a phishing or scam campaign.

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
  • 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://resalured.ru/award?keyword=the+ripple+effect+greg+wells+pdf+download PDF link annotation
    • http://sepibuzare.22web.org/17039111475.pdfIn PDF document text
    • https://seritixatot.weebly.com/uploads/1/3/1/0/131070849/xuregetaxolir_xevifutezetid_kusep.pdfIn PDF document text
    • https://cdn.sqhk.co/mapetidul/zsSiden/dadawij.pdfIn PDF document text
    • http://bobixina.getenjoyment.net/reggae_phb_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/iegehg2/planet_fitness_near_me_now.pdfIn PDF document text
    • http://zakazuvanadoze.66ghz.com/esl_compare_and_contrast_worksheets.pdfIn PDF document text
    • https://cdn.sqhk.co/xunalafugapa/hgjihhg/goat_simulator_goatz_mutators.pdfIn PDF document text
    • http://mitimewigupito.mypressonline.com/how_to_become_a_dj_for_beginners_with_laptop.pdfIn PDF document text
    • https://mirotipobidonep.weebly.com/uploads/1/3/4/9/134902528/wesipagevesamo-dapelitaniz-papam.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/xeroguru/68616569893.pdfIn PDF document text
    • http://gumelojapa.epizy.com/gartner_report_on_cloud_computing_2017.pdfIn PDF document text
    • http://tefesapebeto.rf.gd/baixar_jogo_de_damas_para_celular_android.pdfIn PDF document text
    • http://gijifosunusu.epizy.com/zolato.pdfIn PDF document text
    • http://tawosowi.epizy.com/pozalinuw.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/kenema.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/integrated_chinese_1_textbook_simplified_characters.pdfIn PDF document text
    • http://kukosuluwab.rf.gd/guvil.pdfIn PDF document text
    • http://figavexujofivu.rf.gd/akhiyon_se_goli_maare_status_video.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/the_soul_of_an_octopus_quotes.pdfIn PDF document text
    • http://pesivosemero.epizy.com/kangaroo_math_test_2016_answers.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_off00012d80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D80 5456 bytes
SHA-256: 75d2604f5a0bf2b9b5621a005a677790d4c5b2f171d6b6600b2bffb9e6a7d08f
font_01_sfnt_off0001401d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1401D 12052 bytes
SHA-256: 718b561bc2f8f9e6fff59eee463e56683d2a19ce96df9d080a3b940217024726

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