Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c77ec2c20363ad3…

MALICIOUS

PDF

102.0 KB Created: 2021-03-02 02:34:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8e53c280f6574d36625010ca2d62c251 SHA-1: edf5e93dc565f063ec5ad7d9420b2cfb210b4139 SHA-256: 2c77ec2c20363ad3a2b66cf364ed3d633c8f421c8289b5df855faa704f69df15
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one specifically targeting search terms related to 'royal caribbean drink prices in australian dollars', suggesting a phishing or scam lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous links to disposable hosting and link farms further supports a malicious classification.

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://resalured.ru/strik?utm_term=royal+caribbean+drink+prices+in+australian+dollars PDF link annotation
    • http://remontvorot24.com/how_to_remove_gemini_alarm_systemmjb6f.pdfIn PDF document text
    • https://cdn.sqhk.co/fakobijo/ghijgee/79386180112.pdfIn PDF document text
    • https://cdn.sqhk.co/wavefekus/Fjezpih/gokasazazamenusetoji.pdfIn PDF document text
    • https://cdn.sqhk.co/boxewemutox/haWWAie/60928884548.pdfIn PDF document text
    • http://liwitesuzemumex.sportsontheweb.net/xemuletaselubabixile.pdfIn PDF document text
    • http://nejupike.mygamesonline.org/43214219456.pdfIn PDF document text
    • http://dkblogin-de.best/gududunrwkd9.pdfIn PDF document text
    • http://zakewabo.scienceontheweb.net/how_does_the_gone_girl_book_end.pdfIn PDF document text
    • https://cdn.sqhk.co/kuxaroposa/dgfGij5/favixek.pdfIn PDF document text
    • https://cdn.sqhk.co/luwesefizi/11hhdkU/dropp_music_player_for_mp3_online.pdfIn PDF document text
    • https://cdn.sqhk.co/vurikede/AgdXOLA/22533464659.pdfIn PDF document text
    • http://oyuncuxx.com/dewalt_radial_arm_saw_model_gwi_manualdwp6h.pdfIn PDF document text
    • http://kozidozilujivox.getenjoyment.net/how_do_i_light_the_pilot_on_my_fireplace.pdfIn PDF document text
    • https://cdn.sqhk.co/dofewijoras/QhjgHhg/9272860136.pdfIn PDF document text
    • http://quickstore.pro/venaxuyk2pw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://viwuwijagabote.myartsonline.com/42745163771.pdfIn PDF document text
    • http://giworutiw.myartsonline.com/silubenupeb.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/julasotonasakifanebor.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/98465850149.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/logo_quiz_level_37_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/lubiprostone_dosage_form.pdfIn PDF document text
    • http://piwakitidi.onlinewebshop.net/how_to_replace_switch_on_kitchenaid_mixer.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_off00014f17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F17 5380 bytes
SHA-256: 1f791e8943941a3e987d98722eba9703eb02d966836d250da7cccad328c99593
font_01_sfnt_off00016175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16175 11988 bytes
SHA-256: 96e6d2ab9226e75cf656754524b8be24f236e6fbf7966dae5dac5ff734f29311

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