Malicious PDF — malware analysis report

Static analysis result for SHA-256 347b73fc22e201cf…

MALICIOUS

PDF

78.1 KB Created: 2021-03-08 15:25:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c22d546f77ebd14876da6b0f0f44b69b SHA-1: 4388a21aa603417428c3074597ce0d50af1731cb SHA-256: 347b73fc22e201cf020ccd55ad7331b735efb904e848232dc39c6423f4de25dd
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URLs, with a primary focus on 'zajinet.ru', suggesting an attempt to redirect users to a malicious site. The document body, though partially corrupted, indicates a lure related to common English and Spanish verbs, likely to entice clicks on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://zajinet.ru/strik?utm_term=los+verbos+mas+comunes+en+ingles+y+espa%25C3%25B1ol+y+su+pronunciacion PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415742/normal_60228fe63b481.pdfIn PDF document text
    • https://vubupegizisave.weebly.com/uploads/1/3/5/3/135315261/541081c5.pdfIn PDF document text
    • http://ratamaperekeja.22web.org/uk_time_in_24_hour_format_now.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373243/normal_6029da25d169e.pdfIn PDF document text
    • https://sitegevom.weebly.com/uploads/1/3/4/6/134664280/7375336089a70b2.pdfIn PDF document text
    • http://mujudesuxiropa.sportsontheweb.net/making_money_online_surveys_canada.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387408/normal_5fc8d4fdb40b6.pdfIn PDF document text
    • https://muvesajaduxu.weebly.com/uploads/1/3/4/0/134012660/ea7a36.pdfIn PDF document text
    • http://xogunajeraxuda.mywebcommunity.org/nupofufibolibavajuwus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382423/normal_5fe6f9a60bc20.pdfIn PDF document text
    • http://pexawegowe.mywebcommunity.org/56033157605.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417119/normal_5fda6891e5950.pdfIn PDF document text
    • http://sevowina.medianewsonline.com/kuruxanegukipub.pdfIn PDF document text
    • http://dodajavux.scienceontheweb.net/youtube_top_dance_music_2020.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://tifilow.onlinewebshop.net/how_to_clean_small_waffle_maker.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/abb_ability.pdfIn PDF document text
    • http://duguteterexu.epizy.com/remepulalimoraligirazo.pdfIn PDF document text
    • http://dasobiviwadodaj.atwebpages.com/white_fang_movie_2020.pdfIn PDF document text
    • http://farefimejige.rf.gd/74689474297.pdfIn PDF document text
    • http://pizoxuwa.epizy.com/gukerawipule.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/domuj.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_off0000e3df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DF 5512 bytes
SHA-256: 6e633fd19c583805aa5821e446124d2fef91c82881111251c31e6264b855628c
font_01_sfnt_off0000f645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF645 10856 bytes
SHA-256: a22b157064eb96ec13c261ac9351a7b84ae6f064e208e60e6ecd2b64d8cfc93f
font_02_sfnt_off000119c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119C7 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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