Malicious PDF — malware analysis report

Static analysis result for SHA-256 25233319bdb8f98c…

MALICIOUS

PDF

88.8 KB Created: 2021-02-27 23:46:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: b1a736006d3c6d81ea0dc2f6a36ccdbb SHA-1: a22d7e6787a79d3ab9ac5ad5a5e9e6fc546c0963 SHA-256: 25233319bdb8f98c2002f4c3c6f050f38e99dc8b64e21ac934ee81e5e6b719f7
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting and exhibiting link farm characteristics, strongly suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://mezovuduw.ru/strik?utm_term=ek+the+power+of+one+songs PDF link annotation
    • http://homeolimp.com/advanced_techniques_for_the_modern_drummer_vol_23ip06.pdfIn PDF document text
    • http://piwulefimer.22web.org/41522768184.pdfIn PDF document text
    • https://cdn.sqhk.co/vifamepupib/JT4Uihx/fashion_superstar_dress_up.pdfIn PDF document text
    • https://cdn.sqhk.co/redexisa/nzhhNje/virtual_families_2_extremely_weak.pdfIn PDF document text
    • http://pitowiragomiwa.22web.org/bengali_movie_top_websites.pdfIn PDF document text
    • https://cdn.sqhk.co/mofijovelu/icUidhF/download_ace_fishing_wild_catch_mod.pdfIn PDF document text
    • http://watulexop.iblogger.org/formation_a_distance_adjoint_administratif_territorial.pdfIn PDF document text
    • http://liketime.online/55222120389v7oj8.pdfIn PDF document text
    • http://invitesistem.ru/bose_wave_radio_cd_player_bluetootht5hfj.pdfIn PDF document text
    • https://cdn.sqhk.co/ximegawaso/haPeRgf/dark_side_of_the_moon_tattoos_brownsville_tx.pdfIn PDF document text
    • http://dietnatur.fun/meme_sound_meme_soundboardxz013.pdfIn PDF document text
    • http://vunekopewode.22web.org/kowubexizibidibixasebe.pdfIn PDF document text
    • https:///a10.gaanacdn.com\/images\/albums\/52\/1838952\/crop_175x175_1838952.jpgIn 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
    • https://s3.amazonaws.com/makumapikeze/61567940863.pdfIn PDF document text
    • http://vedibovejixi.epizy.com/35160892239.pdfIn PDF document text
    • http://dutebowoxaj.rf.gd/docker_mac_17._09.pdfIn PDF document text
    • http://jinufezep.epizy.com/bopopaji.pdfIn PDF document text
    • http://gosovugan.epizy.com/telecharger_asphalt_7_heat_gratuit_pour_android.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_off0000fbe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE7 4772 bytes
SHA-256: 7185b406bfd73a34b077be8cb4a289328b6ff82f927a171288396716a5c97bea
font_01_sfnt_off00010c30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C30 11152 bytes
SHA-256: 5cb4a69e4c7a1514ec5b7e673103e52cf1f2da7397b569f9476fccc9b9b6615b
font_02_sfnt_off0001326a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1326A 16164 bytes
SHA-256: c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e
font_03_sfnt_off0001477f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1477F 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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