Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a03b039730c98ca…

MALICIOUS

PDF

71.9 KB Created: 2021-03-28 18:01:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 3bdad4ab06c7f839f02619cc69d8a6ec SHA-1: d6a5942cb3836751d6debf03aa3f7f6758c775fb SHA-256: 2a03b039730c98cac19424ee2c905dc07efbd4ade7b850263c52cf16358c5e6e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, with one prominent URL leading to a site offering a 'plants vs zombies 2 hack pc'. This, combined with heuristics indicating a link farm on disposable hosting and a high ML classifier score, strongly suggests a phishing or malware distribution lure. The ClamAV detection further confirms its malicious nature, identifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dugedepap.ru/wix?keyword=plants+vs+zombies+2+hack+pc PDF link annotation
    • http://thecabinets.xyz/nagibejikarofaf8p35o.pdfIn PDF document text
    • http://fumizudo.sportsontheweb.net/past_perfect_active_and_passive_exercises.pdfIn PDF document text
    • http://xuxijosut.sportsontheweb.net/how_do_i_find_my_metabank_account_number.pdfIn PDF document text
    • http://metinozub.iblogger.org/3m_di-_noc_spec_sheet.pdfIn PDF document text
    • http://realwockyc.info/whirlpool_top_load_washer_door_locked_light_flashingoamy5.pdfIn PDF document text
    • http://edarudost.online/horizontal_analysis_balance_sheet_interpretation40sx4.pdfIn PDF document text
    • http://xadexawufomovi.sportsontheweb.net/descargar_aperturas_de_ajedrez_gratis_en.pdfIn PDF document text
    • http://chebsvet.ru/64653573673l5mvu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sawelisibov.rf.gd/zanixawiwo.pdfIn PDF document text
    • https://0c6b7a74-1ca0-41da-943c-c268a208a416.filesusr.com/ugd/fef373_f30f1d52e82842b289e72f1ba38b20d9.pdf?index=trueIn PDF document text
    • http://gidimuni.epizy.com/27367690170.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55656c6c-3161-4af8-adea-5063edc3b1da/levikiwonifoluvaruxoji.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/edelman_trust_barometer_report_india.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/valores_normales_biometria_hematica_pediatria.pdfIn PDF document text
    • https://ca30e0e0-ecf2-44ab-b6a2-fe26291458be.filesusr.com/ugd/34e21e_ae6805682904402dbf25ccefaa89cc74.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xeroguru/what_is_4_pics_1_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fed60f1a-4274-4b9d-8744-70db24858cbf/how_to_check_mathcad_license.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/62287675297.pdfIn PDF document text
    • https://46d16763-6c5f-4e19-aa2c-3f4071fcbec2.filesusr.com/ugd/26f730_90e7a902c65848228a87fd402395f9fc.pdf?index=trueIn PDF document text
    • https://90ff81fc-98d9-4e53-96a3-aaa5c1c2042e.filesusr.com/ugd/bb5aff_0743d9e8a7164a27a78c7ea4dd605a7c.pdf?index=trueIn PDF document text
    • https://5b949be5-44ef-49af-96c7-0ebaa8fe632e.filesusr.com/ugd/3402b1_46d0adf0780b49448d11dc19f8ca2d2c.pdf?index=trueIn 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_off0000dbb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB9 5524 bytes
SHA-256: 649f168319212e40a16f6ce89fc04f0450ef26a3ce54468da2577f9db5c0bd18
font_01_sfnt_off0000ee6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6E 10604 bytes
SHA-256: b7f33798cfd50761fbba2401ac68a188f2bc72cf9fb54fa72c6e185f1e3e1092

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