Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0d81771e2071ea3…

MALICIOUS

PDF

77.0 KB Created: 2021-03-22 19:25:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 5a902eaefd0fd3b94525f7f8e56ed801 SHA-1: 22983728459c84d994e54910b7ce9dc3d0bc52e3 SHA-256: e0d81771e2071ea3ac69a3063dfc651520edaab134e64805845225ee124d947f
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to financial terms, aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jottigo.ru/award?keyword=capital+revenue+and+deferred+revenue+expenditure+pdf PDF link annotation
    • https://cdn.sqhk.co/ruxagoxoman/shahchi/epic_books_promo_code.pdfIn PDF document text
    • https://cdn.sqhk.co/tigixexaxi/aiaXhbJ/facebook_lite_apk_download_2020_latest_version.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxuzobisu/tgg4Cku/pottery_barn_outlet_joliet_opening.pdfIn PDF document text
    • http://vitofemegawe.getenjoyment.net/51494227389.pdfIn PDF document text
    • http://xudogiborijum.66ghz.com/hoehnelii_chameleon_care_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/lotidonita/vCsSgjO/maryland_live_price_is_right.pdfIn PDF document text
    • https://cdn.sqhk.co/titusegik/iekjggh/serojuzazirexaj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d03ec42c-8b93-48d3-a61e-9aee396c0db4.filesusr.com/ugd/1e557c_032a6aeac69e4896979afdd7572cd543.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/16095039123.pdfIn PDF document text
    • https://62abf401-5fc9-4991-ac00-cb6a0c8cf8ec.filesusr.com/ugd/e4ff69_65ad77f9c25b45449ab05f9e02ec76a0.pdf?index=trueIn PDF document text
    • http://fuvuvadut.onlinewebshop.net/movie_maker_free_download_for_windows_7_without_watermark.pdfIn PDF document text
    • http://nebakeditawow.epizy.com/format_java_code_in_sublime_text.pdfIn PDF document text
    • https://6b137298-3864-41c5-aaa3-11744000c3c2.filesusr.com/ugd/b916f4_e5fcebe0d0a64a5f8b5b669c190869dd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bodajaku/bissell_cleanview_swivel_rewind_pet_upright_vacuum_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/health_o_meter_digital_scale_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/dixukifexumotumupusuzotuj.pdfIn PDF document text
    • http://xutugaveteselul.epizy.com/88249618854.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/10562343512.pdfIn PDF document text
    • https://ef5e9b3f-1a8e-4c79-9b60-34b8f8133c96.filesusr.com/ugd/18574e_e13089066a9841e2ba87f5e4dd8f5420.pdf?index=trueIn PDF document text
    • https://2e81f42f-67f9-46a9-89e2-a5f3ab3b03ee.filesusr.com/ugd/f138f5_80f8854b62424436ab3d63434535616c.pdf?index=trueIn PDF document text
    • http://bedekopezedegej.rf.gd/construction_sheet_metal_worker_jobs_in_canada.pdfIn PDF document text
    • http://rodedewezijore.atwebpages.com/pdf_file_reducer_in_kb.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_off0000ece9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE9 4888 bytes
SHA-256: a3377f34c6948a005c48a3a6e89be2078487d017bbb0754f660fb5c6617c518d
font_01_sfnt_off0000fda2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA2 12532 bytes
SHA-256: b709f414e1c752809276d53e0d66e36d790182b5832e25c518ba42cf9be3afdf

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