Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8da2af7276dd5ff…

MALICIOUS

PDF

77.7 KB Created: 2021-03-01 03:07:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a936cb71fea64dc3fafca5551928e4da SHA-1: b3a745267fa83b575c6bfa2d5dde87f3de5bb232 SHA-256: e8da2af7276dd5ff290a9b2ef2b601880269e10cae3cfbdd1cf4b2abf626d2d8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, many pointing to link farms on disposable hosting, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains keywords related to 'benzoin condensation lab' and application metadata, likely serving as a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/wix?keyword=benzoin+condensation+lab PDF link annotation
    • https://cdn.sqhk.co/nemuvefik/WjeJijI/yellow_wallpaper_background_information.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391599/normal_5ffb69faef20c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486354/normal_5ff9beb69faf2.pdfIn PDF document text
    • https://cdn.sqhk.co/sajatanugeg/hhmJwgh/ghost_riders_in_the_sky_johnny_cash_meaning.pdfIn PDF document text
    • http://moxegelubopidi.sportsontheweb.net/why_did_the_spanish_armada_failed.pdfIn PDF document text
    • http://naliputa.mywebcommunity.org/how_to_do_six_sigma_certification_in_india.pdfIn PDF document text
    • https://cdn.sqhk.co/nokulebepoba/hcIsgeX/slimefest_2020_inglewood_ca.pdfIn PDF document text
    • http://losewunisa.22web.org/poxejevimiwola.pdfIn PDF document text
    • http://sukutoxuwurif.mywebcommunity.org/instruments_in_the_redeemers_hands_facilitators_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwunikuneg/ncfVig2/2024725579.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378613/normal_603c39e1bf1e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366647/normal_6010b68032140.pdfIn PDF document text
    • http://manovina.mypressonline.com/vafibogevorimiwabawikedi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://sogivuwe.onlinewebshop.net/66761261071.pdfIn PDF document text
    • http://kenesowozowojaw.myartsonline.com/99469752090.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/biological_science_book_free.pdfIn PDF document text
    • http://kavibajegis.onlinewebshop.net/dsl-2750u_firmware_middle_east.pdfIn PDF document text
    • https://s3.amazonaws.com/masevewi/logo_quiz_answers_level_27.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/ny_giants_latest_injury_report.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/broadsheet_best_bars_sydney.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/cell_organelles_and_their_functions_worksheet_answers.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_off0000e7a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A1 4864 bytes
SHA-256: 309df6f86b525379b36d307c42f9cc4cb549d412d05bc070d418fc2771b9a4b2
font_01_sfnt_off0000f835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF835 10308 bytes
SHA-256: 9eab8ab8260a8688c29970f85ce71835a1f21efe4bafe6e8a37d46709dcb0836
font_02_sfnt_off00011b78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B78 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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