Malicious PDF — malware analysis report

Static analysis result for SHA-256 fefe7e564374106d…

MALICIOUS

PDF

78.0 KB Created: 2021-04-16 01:55:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ff9d8068d5a21a5fe29b7ef66a65bbd SHA-1: 580d2eb848ba7d9fc7c9f062f11d2b6cacccd0f4 SHA-256: fefe7e564374106daa787bec1d77c341b114fbb94cbd7c47a275b06b2cee6fda
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and a high-confidence ML classifier flagged it as malicious. The ClamAV detection 'Pdf.Phishing.Trojan' further supports a phishing or trojan distribution intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing lures designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/strik?utm_term=qu%25C3%25A9+es+l%25C3%25ADder+espiritual
    • http://xelamoxadavas.mywebcommunity.org/koyo_needle_roller_bearing_catalogue.pdf
    • http://lixejinokegiror.22web.org/auditing_assurance_services_10th_edition.pdf
    • http://punavuvipufov.sportsontheweb.net/surfactants_in_agrochemicals.pdf
    • http://instapriz365.online/3347582106l07tu.pdf
    • http://zutelotojenexop.getenjoyment.net/tipos_de_energias_renovables.pdf
    • http://womotov.22web.org/wewepifemefanesogaw.pdf
    • http://just-gopro.com/saluwotez43zg8.pdf
    • https://redewude.weebly.com/uploads/1/3/1/3/131379671/934971.pdf
    • https://zijobezugol.weebly.com/uploads/1/3/2/6/132682913/fipezuledogabutofuvo.pdf
    • http://gexopidikimo.mygamesonline.org/jofis.pdf
    • http://lightstart.xyz/internet_manager_6._32_build_6_kuyhaa49ixb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://656adf98-7a81-40bd-8d0f-2b9c27d09201.filesusr.com/ugd/268ab1_ae2caa67955849d980372370e1ced642.pdf?index=true
    • https://89d9876f-4e47-4433-ab5b-8da47ae3ae5c.filesusr.com/ugd/37c326_af7a5a3e7d3545f8ba84a064f7050c8d.pdf?index=true
    • http://sirovorisolilu.rf.gd/mukiwoxurog.pdf
    • https://uploads.strikinglycdn.com/files/a23e3096-5ab1-46b6-a05b-e132ab266257/73613240036.pdf
    • https://uploads.strikinglycdn.com/files/90c9a8d2-2110-4ed4-8940-95b9ad031e5d/how_to_connect_audio_to_computer.pdf
    • https://650c977b-0274-48a2-8498-43c0efc39f4e.filesusr.com/ugd/dbad32_c1baf9be39b04201a6f3b26a5fe87edf.pdf?index=true
    • http://fezipowivi.rf.gd/mavipevogilurobunuti.pdf
    • http://zagupijalixi.myartsonline.com/arabic_calligraphy_lessons.pdf
    • https://4121a797-204a-431c-92a8-8e24072fb342.filesusr.com/ugd/b972d5_797d677b880d43a3979550f2d6d2e301.pdf?index=true
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f177.bin
f804882ca7ff91c6dfaf6a56e72f64c244cfa7e9d55994d34588683f6f773350		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF177 5212 bytes
font_01_sfnt_off000102ee.bin
61280e371fe9322530e522682e70f20475f16a132f8ae43d2004c077597d152d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102EE 11668 bytes

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