Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc89a2cbb1afe2c6…

MALICIOUS

PDF

78.9 KB Created: 2021-03-09 06:52:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 42d88068fb1d617cf0c3a0ca6554a32d SHA-1: d61720948432bac8f8eb714bb1af5fb44f1756cf SHA-256: dc89a2cbb1afe2c6de7ebc3f07bdc9b966486faf9e51367915254416e9713eb6
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs pointing to domains associated with malicious activity, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' heuristics. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. The document body, though heavily obfuscated, suggests a lure related to 'Biodiversity conservation regulation 2020 pdf'. The presence of external URIs and the overall detection profile strongly suggest a phishing or malware distribution attempt.

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://fokemale.ru/award?keyword=biodiversity+conservation+regulation+2020+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421056/normal_602d695659abc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467955/normal_600ce72fbf71c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365626/normal_5fc6582c831c0.pdfIn PDF document text
    • http://wuxijuvusif.22web.org/how_to_trade_in_stocks_jesse_livermore_epub.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426967/normal_5fe3a69ade01e.pdfIn PDF document text
    • http://wisevesimo.22web.org/55615446727.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/d355debf-e6a1-467f-a146-f4cdc829245d/2005_jeep_grand_cherokee_tire_torque_specs.pdfIn PDF document text
    • http://zikomum.epizy.com/rockstar_guava_energy_drink.pdfIn PDF document text
    • http://defisatum.epizy.com/6084006340.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fca19e5-fd42-42e3-ba06-cb4468a01789/81188769785.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/ocean_eyes_billie_eilish_piano_sheet_music.pdfIn PDF document text
    • http://luturuwuxas.epizy.com/awestin_ness_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/19305995562.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46887a4e-2355-452c-a47c-c2bcb7818001/z_for_zachariah_book_pages.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79b813b3-cb04-4434-be94-270ab09ce469/weber_spirit_ii_e-310_natural_gas_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83ffd411-ddc1-48c8-a014-1750166f5098/longman_dictionary_of_contemporary_english_vk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba95cf25-4a15-491f-9404-6467711140e8/32713196947.pdfIn PDF document text
    • http://moliwofasekimu.epizy.com/20827148656.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1902989-10a3-4a68-89d4-636ebde19f7d/21315009009.pdfIn PDF document text
    • http://letugupinuvanu.rf.gd/why_were_alliances_a_main_cause_of_world_war_i_brainly.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_off0000f763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF763 5808 bytes
SHA-256: 9d2e06a9676c4c01a812cba088258d9db7486e2430ec28195111be5e159ee2b0
font_01_sfnt_off00010b53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B53 10004 bytes
SHA-256: 373379a7918a59044ba9291017fa0d0bc2e18fe2fd80ebe125606ccf969d2944

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