Malicious PDF — malware analysis report

Static analysis result for SHA-256 a964b49cf889fa10…

MALICIOUS

PDF

85.1 KB Created: 2021-03-24 11:54:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: c0992ad04458680395213ff1556f1f1e SHA-1: 98bb896bdc512cdccab7906d6dd8015cbac60b6a SHA-256: a964b49cf889fa10072bc63c10231585c29920c883eafff42ded6b274b1d4e73
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 hosting, indicating a link farm designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded links are consistent with techniques used to deliver second-stage payloads.

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://leonvi.ru/wix?keyword=schwinn+foot+pump+manual PDF link annotation
    • http://shoop-fh.ru/psychology_facts_in_tamilis1fa.pdfIn PDF document text
    • http://kezijego.22web.org/timiperorug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406223/normal_5fd17e8830a60.pdfIn PDF document text
    • http://reactivascotia2020.com/ropunw69bd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375541/normal_5ff39d8e09a10.pdfIn PDF document text
    • http://lerevujoda.iblogger.org/82984655843.pdfIn PDF document text
    • http://nazorizuz.medianewsonline.com/86376839992.pdfIn PDF document text
    • http://alania365.ru/housefull_3_movie_download_khatrimaza9rqsr.pdfIn PDF document text
    • http://getveran.site/ps4_controller_wont_turn_on_unless_plugged_in_reddit27avt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://488c2ff9-9ff4-499e-8f11-525115e20b22.filesusr.com/ugd/8aba0c_15d9e6865ecd4582a8736e88529a590c.pdf?index=trueIn PDF document text
    • http://sopavame.onlinewebshop.net/taxefufuwevotosuvodokuzog.pdfIn PDF document text
    • https://6b2f37ea-3696-4b87-858b-663c379f6f6f.filesusr.com/ugd/16879a_d8e828572f3b42779ecf56c02ebcc909.pdf?index=trueIn PDF document text
    • http://nuzubiwow.epizy.com/56746499103.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc1bf432-6e22-4bbf-b029-c84b7cae62e9/does_nora_kill_herself_in_a_dolls_house.pdfIn PDF document text
    • http://satawakerexe.atwebpages.com/what_will_the_9th_dog_man_book_be_called.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/618bfe93-f668-4972-90ae-5c5cc2296c4b/how_to_set_up_sennheiser_wireless_microphone_g4.pdfIn PDF document text
    • https://e0271a52-a7af-48e9-8a99-924ce320ec62.filesusr.com/ugd/be5703_26d4c767efa44df5878b4f4431097628.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/99a7c886-ab11-4179-9a90-0f5cf217ddc7/fusagavibinodibupakaxuja.pdfIn PDF document text
    • http://fipiwafupogo.epizy.com/kepofosuxi.pdfIn PDF document text
    • http://gitojaxekeveki.onlinewebshop.net/kotal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d170fb7b-583e-484e-a7f7-caa840e83f2c/usf_campus_map_admissions.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_off00010d7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D7D 5176 bytes
SHA-256: 5392af10de97784ebd742e5902a41d79602630de58c61807740c36ef81a3c1e1
font_01_sfnt_off00011f12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F12 11836 bytes
SHA-256: e91264822d5daac0a23846813ca666c54811dab14edcd293adf5546b9cba7a11

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