Malicious PDF — malware analysis report

Static analysis result for SHA-256 14d7eb66626cf563…

MALICIOUS

PDF

80.6 KB Created: 2021-05-30 18:35:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: da4da07b98c642ea33399a886efe3184 SHA-1: 576df40c3f013b9ef34e685302e5a55beb6cb0d8 SHA-256: 14d7eb66626cf5630e02a3105602d67fae00be8b058317f570504d710d6eb69c
156 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. It contains a large number of external links, including one pointing to 'jottigo.ru', which likely serves as a lure for downloading malicious content. The document body, though heavily obfuscated, contains references to 'The amazing spider man 2 apk and obb offline', suggesting a social engineering pretext for the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/strik?utm_term=the+amazing+spider+man+2+apk+and+obb+offline PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4423427/normal_5fe84e8e49fdc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418365/normal_5fc73d4c13004.pdfIn PDF document text
    • https://vatosulutat.weebly.com/uploads/1/3/4/5/134587817/dbc3ffa2ea574dd.pdfIn PDF document text
    • https://lawawumusew.weebly.com/uploads/1/3/4/7/134765042/649a0f068c86.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452392/normal_60011cbf7cca8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388421/normal_6057c549a73c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365552/normal_5fe13be77ec0b.pdfIn PDF document text
    • https://wesafave.weebly.com/uploads/1/3/4/3/134307961/2084437.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409417/normal_5feb6d276fb36.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485580/normal_5fce70de26850.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f70dfe1-7812-4692-91a3-f81693843791/fisepeni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce7a7108-d1eb-44c1-b628-cef573928bb5/traductor_en_espaol_latino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8a33676-f269-4957-843d-3c53a02bbb8b/omron_wrist_blood_pressure_monitor_manual_bp6350.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d7de0c4-1fe1-497e-aaaa-2cee03955c35/jegalezavo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d8c1ee9-470a-42e9-b54b-6e247960041c/28077516770.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17ca23d4-9be7-4ba0-992f-8c65e0eb14ea/10907838602.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5894878f-0081-47ba-be09-5a56f62d9f6c/the_magicians_imdb_cast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db6847df-c6a2-4ca4-ba1d-79e92700e119/begexawewewulo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff7afeff-b6a3-4956-943e-7c1c7822b3cf/how_long_after_starting_to_workout_will_you_see_results.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbc2a682-d726-4d55-9440-ac108a75de93/zelinabupobipomemumu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cd838a7-8585-4007-9b18-447a4e519a3a/do_i_need_a_window_for_a_portable_air_conditioner.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_off0000f731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF731 5792 bytes
SHA-256: dfd39ce9207ecd86b83c7c207c05705690cc1f35babdb73198ee6b91e5d5f117
font_01_sfnt_off00010ac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC4 12916 bytes
SHA-256: 5773f7f9ea20c468ba037878d1dfd83ad376025e4c0fe263bf17ef9f3153e1e9