Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dca819f4978fc14…

MALICIOUS

PDF

185.9 KB Created: 2021-04-02 12:56:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e51ae82d3170bd478c46f63567a8bb63 SHA-1: 4803ca5c4d340bcc5fe9a8bf449ee7d279e8f24a SHA-256: 5dca819f4978fc14d9e835032d60bc38586602ce6fb5f8792af9901bdf79152a
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to 'despicable me 1 script pdf'. The presence of numerous external URIs, many on disposable hosting, indicates a link farm designed to redirect users to potentially malicious content. The primary malicious URL identified is https://druttle.ru/award?keyword=despicable+me+1+script+pdf.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/award?keyword=despicable+me+1+script+pdf PDF link annotation
    • https://cdn.sqhk.co/tevunufoba/PhgHjeF/verodoresuxugenot.pdfIn PDF document text
    • https://tubonizuruzoxuk.weebly.com/uploads/1/3/0/9/130969435/fezaduji.pdfIn PDF document text
    • https://puwoposujol.weebly.com/uploads/1/3/0/9/130969317/634747a.pdfIn PDF document text
    • https://cdn.sqhk.co/kubepugemaki/igh77hg/joker_english_movie_ringtone_download_pagalworld.pdfIn PDF document text
    • https://cdn.sqhk.co/jalosemuv/e5jejfO/navejifalogupatazakonotuk.pdfIn PDF document text
    • http://tuvexiwegivuke.iblogger.org/nedepuvakometaluwes.pdfIn PDF document text
    • https://cdn.sqhk.co/vukupamita/ihihigg/wig_master_wplr.pdfIn PDF document text
    • http://xiredanu.22web.org/agroforestry_books.pdfIn PDF document text
    • https://cdn.sqhk.co/zelosoza/bTihjf0/word_link_level_874_answers.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/0e02e210-53b6-4f54-a9a2-a7ef68569392/nerotimoju.pdfIn PDF document text
    • http://dopodisimedu.epizy.com/mifodawarefepat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44cffd03-9f3c-4d38-94e3-155c9d76d863/witcher_2_mods_not_working.pdfIn PDF document text
    • http://defizal.epizy.com/14091668551.pdfIn PDF document text
    • http://sogigadataga.epizy.com/bickerstaff_neurological_examination.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abe05b35-9a87-4f5f-ac65-66807e6452cb/dewad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09292539-a33f-4a8b-a954-32badf42f08f/como_saber_cuando_es_el_mejor_momento_para_quedar_embarazada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d304c3f5-1595-4887-8088-2d35f5570624/yamaha_mg10_2_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e332645-3235-4dea-b8a4-c1b1f4fd3d71/is_project_x_based_on_true_story.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/733f8294-49a3-4720-bd36-f4bf50c2fad2/55359978819.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/219214e0-0864-4e7d-b957-678f54bfe70b/michael_vey_book_6_read_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcde5d7a-2b43-42f8-8110-4e8c7e81c51c/7461840183.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_off0002a1d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A1D9 5492 bytes
SHA-256: 83ca5f36e5f34670f604be9710129558e8e0f24109c29d948657a73533447702
font_01_sfnt_off0002b474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B474 11052 bytes
SHA-256: c7934fcd1a13745baae794d3efc9963ea31141fe375585b2a1d0cec85e2c74cc