Malicious PDF — malware analysis report

Static analysis result for SHA-256 e32ae7b8d15ed7ef…

MALICIOUS

PDF

95.0 KB Created: 2021-04-24 21:51:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 503443baf9aba5423c317c84381982c8 SHA-1: 6ae576b14cfb5d91684502cac6f8ef4af38345c0 SHA-256: e32ae7b8d15ed7ef2d609b1310200a453e47349b4387cd041bbc35d04a0581dc
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://baarspo.ru/strik?utm_term=aprende+ingles+rapido+y+facil+leccion+1 PDF link annotation
    • http://kogixuserevuf.22web.org/ansi_ashrae_15_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/lulaxujik/ft60fhe/spotify_for_artists_app_windows.pdfIn PDF document text
    • http://sijubuwejipamun.mywebcommunity.org/eragon_book_1.pdfIn PDF document text
    • https://cdn.sqhk.co/zurefaxenov/gfafjiq/fowubulaxus.pdfIn PDF document text
    • http://xekugesakurupab.22web.org/traducir_de_ingles_a_espaol.pdfIn PDF document text
    • http://gomigapujasep.sportsontheweb.net/mupureral.pdfIn PDF document text
    • https://cdn.sqhk.co/xonarewu/LF5ihjb/escape_zombie_city_vs_escape_temple.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403266/normal_60501f8559fc4.pdfIn PDF document text
    • https://cdn.sqhk.co/mewobonovagi/jhichdb/gelexukupegezuralanujapi.pdfIn PDF document text
    • http://zijixiteluwek.scienceontheweb.net/an_ember_in_the_ashes_movie_adaptation.pdfIn PDF document text
    • https://cdn.sqhk.co/desiruzag/gfdifig/togagukoxejisakexejog.pdfIn PDF document text
    • http://sutivebako.iblogger.org/pisanivekove.pdfIn PDF document text
    • https://cdn.sqhk.co/kululojilo/v5jcqia/xetibos.pdfIn PDF document text
    • https://cdn.sqhk.co/gigijuke/gggdfRC/92487269411.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476757/normal_5fc6ab083a5d5.pdfIn PDF document text
    • http://dazenad.iblogger.org/pogigezopowapofubu.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://luregaw.onlinewebshop.net/blackjack_strategy_download.pdfIn PDF document text
    • http://tiwojojerat.rf.gd/bacterial_spore_formation_steps.pdfIn PDF document text
    • http://bogetezapore.rf.gd/10934288313.pdfIn PDF document text
    • http://zisuvedo.rf.gd/mobile_ad_hoc_and_sensor_networks.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F5B 5176 bytes
SHA-256: d9bc02b4e4bdb6aee75e17737130af8e11acf231659fe3404b3ffc0a8d2c2b5e
font_01_sfnt_off00012107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12107 12340 bytes
SHA-256: 18ab1e61c368213707af8a1f739322612ef0c641e4884d4d948b6b573cbb84e2
font_02_sfnt_off00014932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14932 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15
font_03_sfnt_off00015e60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E60 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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