Malicious PDF — malware analysis report

Static analysis result for SHA-256 257e4c59ead33b16…

MALICIOUS

PDF

77.5 KB Created: 2021-02-18 05:49:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 99b96e2f1b16ab6a823373ddad7a69d9 SHA-1: fccf36586e6092528dcba6bdc02c74e8ea1a0553 SHA-256: 257e4c59ead33b162d0fab297ee5be3e0721f0bb19d330ded32b1531bcb0a3b4
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs pointing to suspicious domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the presence of numerous external URIs and the overall heuristic profile point towards a malicious document designed to redirect users to harmful content.

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://maypoin.ru/wb?keyword=the%20devil%20finds%20work%20for%20idle%20hands%20quote PDF link annotation
    • https://bilunoxenaxu.weebly.com/uploads/1/3/4/4/134474733/vanupixavolegur.pdfIn PDF document text
    • http://yarrebitteh.online/tumutdr87l.pdfIn PDF document text
    • http://lovemecompletely.com/html5_viewer_w3schoolsww7o3.pdfIn PDF document text
    • http://samettemiz.xyz/puwepapopebawejasakowu5f1f1.pdfIn PDF document text
    • https://rokozozo.weebly.com/uploads/1/3/4/4/134498035/wamizujilanuje-rabozifezafujew-watuzabu.pdfIn PDF document text
    • http://winoorama.space/movies_to_watch_on_netflix_for_tweensm5riv.pdfIn PDF document text
    • http://zofoxexizoviro.iblogger.org/38604748909.pdfIn PDF document text
    • http://korsabarca.com/watch_the_hunley_movie_online_freekbpwj.pdfIn PDF document text
    • http://onlinekartiadesi.com/gexarepovomewqwmf.pdfIn PDF document text
    • https://sudarotabodubig.weebly.com/uploads/1/3/1/4/131407445/rusexased_lisozuta.pdfIn PDF document text
    • https://nivujetomut.weebly.com/uploads/1/3/4/7/134753784/xojekuboz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503584/normal_600ad6077a16e.pdfIn PDF document text
    • http://tehnotop.store/wibotagelagifopodogutbojmg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393624/normal_6010d9f42b3a8.pdfIn PDF document text
    • http://vknart.xyz/google_play_store_dark_mode_apkx20vh.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
    • https://s3.amazonaws.com/woxojuxafopuv/sharingan_live_wallpaper_full_free.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8FC 3260 bytes
SHA-256: 00ce7fd3f7f9c8840a5577d2c9d112e222071feea3506d7c125dd3a51b8fb926
font_01_sfnt_off0000e4b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B0 5168 bytes
SHA-256: fd07a4eb341b4b5ff4a1c51e74d383631c97366007b1846205f713404d5eb66a
font_02_sfnt_off0000f64a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64A 10456 bytes
SHA-256: 022fa9828dccdcf51a20e9ec1cbb7406f8da9b41b8b4ab72d76b32436791870f
font_03_sfnt_off00011a02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A02 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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