Malicious PDF — malware analysis report

Static analysis result for SHA-256 698f49e0bde14ae6…

MALICIOUS

PDF

67.9 KB Created: 2021-02-25 03:13:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 8098bad442d0774421cad144b3ec0fcb SHA-1: b08b66b09e2ab6402e13de30b5a6895459bc7b9e SHA-256: 698f49e0bde14ae6ce67e22d35caa74f695b9b4bb2840b5896acd98f5ce6108e
126 Risk Score

Malware Insights

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

The sample was detected by ClamAV as Pdf.Phishing.Trojan and an ML classifier flagged it with high confidence. It contains numerous external URIs, many hosted on disposable domains, indicating a link farm designed to redirect users. The presence of multiple external links suggests an attempt to lead the user to a malicious site for further exploitation or phishing.

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://jacksth.ru/123?utm_term=guardian+ad+litem+florida+optima PDF link annotation
    • https://vemusosafuz.weebly.com/uploads/1/3/1/3/131398108/7430764.pdfIn PDF document text
    • http://barajofa.mywebcommunity.org/how_to_program_seiki_remote.pdfIn PDF document text
    • https://bovabesizepin.weebly.com/uploads/1/3/1/3/131383515/ditej.pdfIn PDF document text
    • https://sajinekud.weebly.com/uploads/1/3/5/3/135391411/vovebabiditiz_lotumovowex.pdfIn PDF document text
    • http://junumidutuzakox.getenjoyment.net/71305868070.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478951/normal_60006a6fa3b65.pdfIn PDF document text
    • http://pixunune.sportsontheweb.net/how_to_use_the_mini_keurig.pdfIn PDF document text
    • http://fefiwizam.sportsontheweb.net/escuelas_contemporaneas_de_la_psicologia.pdfIn PDF document text
    • http://xuwuvewisin.mypressonline.com/planet_fitness_pf_black_card_worth_it.pdfIn PDF document text
    • http://jinevul.mygamesonline.org/is_triss_mom_divergent.pdfIn PDF document text
    • http://newuwedeza.mypressonline.com/57554813918.pdfIn PDF document text
    • https://tabekemaw.weebly.com/uploads/1/3/0/8/130874329/korinerek_zuxeboz.pdfIn PDF document text
    • http://lenudes.com/mayday_movie_parents_guidevjdzp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fegidil.rf.gd/gumatanafewiwud.pdfIn PDF document text
    • http://dapizodipe.myartsonline.com/how_to_set_up_a_hotspot_on_my_iphone_6.pdfIn PDF document text
    • http://xovipofeguz.epizy.com/b_w_zeppelin_air_manual.pdfIn PDF document text
    • http://xonifovozub.epizy.com/column_chromatography_lab_report.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_off0000cd6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD6E 5040 bytes
SHA-256: e0fb604ff6d814d7be8c0c1271646a1b8b07d1494cffa44126fd78055639883e
font_01_sfnt_off0000de83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE83 10616 bytes
SHA-256: 1affc8ceeb15e41ee9032651347ce36b7705ec86780f0347c9e0cd570aac376e

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