Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e3e929e21cab358…

MALICIOUS

PDF

86.2 KB Created: 2021-03-16 02:54:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 023edd8e071cd050e421b5e9dd97202a SHA-1: c34ae90470588c217b57e6b68359dc40cda93f77 SHA-256: 2e3e929e21cab3587cecc5b87a20c90cc5da88018e9f64843046eea2b2ffd9a6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with a significant portion pointing to disposable domains and identified as a link farm for SEO purposes. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=eye+of+judgement+ps4 PDF link annotation
    • http://daxogupifixago.iblogger.org/p_n_m_ka_full_form.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366324/normal_604cf0751d3b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495034/normal_6047f13d65934.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388062/normal_6008f124b5f14.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/7b59c87d-961f-47f8-aeaf-6d8d5b1db364/best_strength_training_anatomy_book.pdfIn PDF document text
    • http://remawixatiwida.epizy.com/haier_14000_btu_portable_air_conditioner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b47b37c9-444a-4a2d-82a9-d227a5d66180/a_dolls_house_play_character_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e97c072b-c333-4312-9d21-e1e0373f5082/brandsmart_covid_testing_west_palm_beach.pdfIn PDF document text
    • http://tisajepi.epizy.com/home_health_aide_test_with_answer_key.pdfIn PDF document text
    • http://rivebop.epizy.com/fafadunukexusad.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/51225259749.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/gcse_further_maths_textbook.pdfIn PDF document text
    • http://pisasegobure.epizy.com/survival_food_kits_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a623f50-0a2b-4301-a9cf-b5e4cf8bb0b7/is_it_hard_to_learn_r_programming.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ff4a9ed-fbab-4e00-9011-710f4055f337/hamlet_full_movie_1996.pdfIn PDF document text
    • http://bizosubage.rf.gd/zokiwomenana.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/tolugikurabaxowerubom.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE0 9876 bytes
SHA-256: 1c2bd85dd1852c77b24e76a255720192da4def69edd1413ef52cb0a2ea5d892c
font_01_sfnt_off000110d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D5 5244 bytes
SHA-256: c26e433fd8203e0f8392e98b36ebe8fbdf7fc217da149162fc7a22c6da47847f
font_02_sfnt_off000122c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122C1 11464 bytes
SHA-256: 7e2980f41d54655de89c607f5f7f385649490e69b7c1523e58a9b191948a0c0e

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