Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c55cf56c929f7c8…

MALICIOUS

PDF

74.0 KB Created: 2021-03-14 03:44:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 35f4dd188724264ce5f4212178fad7b1 SHA-1: a71ea098b506ddc7f46881cc6f3145581545afcb SHA-256: 0c55cf56c929f7c8ffdb5eedfa10cd99fac444d759807ac3ad51e929809e6229
146 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded URLs, one of which is presented as a 'hydro spa manual', suggesting a social engineering lure. The presence of malformed exploit streams and a link farm on disposable hosting further supports a malicious classification, likely for phishing or scamming purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://bologen.ru/wix?keyword=hydro+spa+manual PDF link annotation
    • https://cdn.sqhk.co/vokalater/ijEidhf/sports_car_racing_games_online.pdfIn PDF document text
    • http://modebedunizux.iblogger.org/element_40_inch_smart_tv_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/logenuzupug/jbijjd4/castle_of_illusion_game_gear_rom.pdfIn PDF document text
    • http://tevejovevufosis.22web.org/bible_quiz_questions_and_answers_for_adults.pdfIn PDF document text
    • http://muluwusive.22web.org/fuxowamupezixotoxizisujol.pdfIn PDF document text
    • http://kilewigi.iblogger.org/how_to_put_water_in_vicks_cool_mist_humidifier.pdfIn PDF document text
    • http://xejevojesinil.22web.org/anemia_in_pregnancy_guideline_acog.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/bce667ad-bd34-44b9-acd6-f4f48402d02d/96020499580.pdfIn PDF document text
    • https://2eda13a9-9e0f-47dd-bbfa-a9a5028a3314.filesusr.com/ugd/61c57f_105bacaacfb04345a608a3d91626bb02.pdf?index=trueIn PDF document text
    • https://9fc80a0e-b25b-4135-afeb-9811a1ea6bf8.filesusr.com/ugd/91e123_3f4a205c16dc41b788e9242871885305.pdf?index=trueIn PDF document text
    • https://b7eb3c74-9f10-4efd-a612-efb7ea03662f.filesusr.com/ugd/7198c1_0b5ee7c055b84c89b7ca15fa5da10363.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a42832d-3314-4aa5-97e2-909234a8bb44/plot_of_pippi_longstocking.pdfIn PDF document text
    • https://9005a25f-7293-4a73-bb0f-bc58e8c16807.filesusr.com/ugd/e3834b_2307b022fbfd45c1a3001d35ef318564.pdf?index=trueIn PDF document text
    • http://bakutogigu.rf.gd/55198114219.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57b9d57c-d496-4570-96e1-a78518312f7a/el_mundo_feliz_resumen_por_capitulos.pdfIn PDF document text
    • http://malunazix.rf.gd/aashto_t275.pdfIn PDF document text
    • http://pagupim.epizy.com/wuvozemukatazu.pdfIn PDF document text
    • http://jobupozedud.epizy.com/islamic_banking_in_malaysia.pdfIn PDF document text
    • http://titodopitafa.rf.gd/do_it_yourself_home_projects_on_a_budget.pdfIn PDF document text
    • http://tixelupaninaber.rf.gd/cub_scout_webelos_requirements_2018.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_off0000e4f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F7 5168 bytes
SHA-256: bb3b6df7c3b185f19d66712cacc6f82a1da5436a8ff893e2670a97d83c12fdf8
font_01_sfnt_off0000f677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF677 10772 bytes
SHA-256: fa8bb510025cb20c04d9d59242c013d87f7540eb0430b4a2eebc19265b9f16e9

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