Malicious PDF — malware analysis report

Static analysis result for SHA-256 1247a3397459ae10…

MALICIOUS

PDF

107.8 KB Created: 2021-04-08 04:19:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 25942c761e0fb52ce96e0f83f2f15b51 SHA-1: 7362b5c4c16f83303e2637d769237e079ca85332 SHA-256: 1247a3397459ae10ca3300657638cb3863934321df36461f9bf72f55e65b6142
126 Risk Score

Malware Insights

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

This PDF document contains numerous embedded URLs, many of which are part of a link farm on disposable hosting, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/strik?utm_term=do+you+need+a+certificate+to+do+eyelash+extensions+in+california PDF link annotation
    • http://lozipazom.sportsontheweb.net/behaviour_couple_therapy.pdfIn PDF document text
    • http://rezubodojel.medianewsonline.com/critical_thinking_skills_for_education_students.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470960/normal_606335b1100ae.pdfIn PDF document text
    • http://jakusavu.sportsontheweb.net/how_to_convert_to_word_without_converter_offline.pdfIn PDF document text
    • http://xejapuz.getenjoyment.net/sapimijenenemof.pdfIn PDF document text
    • http://xawamiwupajev.mygamesonline.org/jack_reacher_2020_movie.pdfIn PDF document text
    • https://jugikezifu.weebly.com/uploads/1/3/4/6/134654678/38f58d169ce78.pdfIn PDF document text
    • https://rurusoweloxefug.weebly.com/uploads/1/3/3/9/133989150/pufovalizapipes_rexutelulo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404741/normal_605dcc483a7d1.pdfIn PDF document text
    • http://xelamoxadavas.mywebcommunity.org/26050068514.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482020/normal_60500a9061759.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sevetise.rf.gd/amenaza_de_aborto_tratamiento_indometacina.pdfIn PDF document text
    • https://d451e762-8e00-4155-9971-9512d28d2528.filesusr.com/ugd/b52961_7f84697927a14a25974618214f8ee21f.pdf?index=trueIn PDF document text
    • http://begujewirefe.myartsonline.com/interpersonal_skills_for_project_managers.pdfIn PDF document text
    • http://lemuguta.rf.gd/68356009952.pdfIn PDF document text
    • https://c301b42c-deab-4116-afcd-a09dd0728425.filesusr.com/ugd/4bb894_f5f22e1cf9074b8db44dbcba9bf970d2.pdf?index=trueIn PDF document text
    • http://zimopup.myartsonline.com/junie_b_jones_and_the_stupid_smelly_bus_chapter_questions.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001505a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1505A 5280 bytes
SHA-256: d540c80bf0b256212bb5eec46cfb7b25722c1a67e980dc42de590ae1eae20c17
font_01_sfnt_off00016259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16259 11656 bytes
SHA-256: 953bc0cc0d502575f9741c8b05e0f98eb350336892b8b491941f390cb9944ec0
font_02_sfnt_off00018a29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A29 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449

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