Malicious PDF — malware analysis report

Static analysis result for SHA-256 0231228097814136…

MALICIOUS

PDF

72.4 KB Created: 2021-03-21 00:56:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 4cdc1cfd0da56f5a6f39a95de703b703 SHA-1: 5142750ba9bbb44774f82241329e220c1b8fda39 SHA-256: 02312280978141364a132cccd7a47086092966ea529778e8970dcba19b53696b
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs and is flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and potentially phishing-related. The document body, though heavily obfuscated, suggests a lure related to 'positioning strategy definition pdf'. The presence of numerous external URIs and link farm indicators points towards an attempt to redirect users to malicious sites, likely for further exploitation or credential harvesting.

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://lozipotod.ru/award?keyword=positioning+strategy+definition+pdf PDF link annotation
    • https://cdn.sqhk.co/toneribabut/hbgcYhf/50051760154.pdfIn PDF document text
    • https://cdn.sqhk.co/vafodagusun/egjhjie/70148274764.pdfIn PDF document text
    • https://cdn.sqhk.co/kufiremikaf/igEgfic/fobadenilefuxukumesopa.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafanez/gdTghic/todigigemi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376869/normal_5ff5b099a2415.pdfIn PDF document text
    • https://cdn.sqhk.co/pifajaloro/eUrBial/star_wars_movies_in_order_timeline.pdfIn PDF document text
    • https://cdn.sqhk.co/nizivatitogu/ggehc5a/link_medical_transport.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487902/normal_604b7003c8f2e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/befufitizevo.pdfIn PDF document text
    • http://judejelalub.rf.gd/cake_recipe_book_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55ed5896-0297-4d25-87ae-f428a7d822dd/3213946485.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/35915772072.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/important_dates_and_events_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/black_and_decker_digital_advantage_iron_temperature_settings.pdfIn PDF document text
    • http://rukanaka.epizy.com/abacus_user_manual.pdfIn PDF document text
    • http://bedegotix.epizy.com/avon_catalogue_march_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/anti_rust_paper_sheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78837957-a664-485f-bef5-6a28933175dd/metal_gear_solid_6_2020.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_off0000dd3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3B 5280 bytes
SHA-256: f4a1f2ed603c4c2b609a220e4f7e5a68110694e10bba05e5939c7d27808a5258
font_01_sfnt_off0000ef4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF4C 10316 bytes
SHA-256: b91f0dc047185dcdb2a9d8141cf6bf2ad2008952c5504f7cb2ad451957c46ecb

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