Malicious PDF — malware analysis report

Static analysis result for SHA-256 a617eef5311cc1de…

MALICIOUS

PDF

78.3 KB Created: 2021-04-17 12:54:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 7488a53c6edbdb7a3daf2ab50a69ec55 SHA-1: c4fc397792a4f9b6234dbeda04f853395043073a SHA-256: a617eef5311cc1deeeba37ca4aec8013d579539647c0f47c7e430686b8c572ea
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 a high number of embedded links pointing to various domains, many of which are associated with disposable hosting and link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and numerous external URIs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=2006+honda+pilot+power+steering+fluid+flush PDF link annotation
    • http://gonunimob.iblogger.org/35062246689.pdfIn PDF document text
    • http://instasale.company/rosomajepowedebsg0wx.pdfIn PDF document text
    • http://wisiripivi.22web.org/45860211225.pdfIn PDF document text
    • http://lareluso.iblogger.org/63059778568.pdfIn PDF document text
    • http://mojenisijita.mywebcommunity.org/17011551698.pdfIn PDF document text
    • http://lnstagramsecurity.net/workplace_safety_and_insurance_act_ontariok99oz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393189/normal_606abece41f76.pdfIn PDF document text
    • http://flowerport.shop/chicago_pd_season_1_episode_1ucd3w.pdfIn PDF document text
    • http://deflecfcvy.best/xijewigupotilaturwcna.pdfIn PDF document text
    • http://vkysnaya-eda.site/titus_andronicus_a_more_perfect_union_lyricsqvw4l.pdfIn PDF document text
    • http://1freedom.space/87457692555r21va.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382406/normal_603667bfae081.pdfIn PDF document text
    • http://rakadan.sportsontheweb.net/nusagafol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/figugipopar/48769375698.pdfIn PDF document text
    • http://ruzofugeru.myartsonline.com/attached_by_amir_levine.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/the_way_to_rainy_mountain_chapter_19_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/is_there_going_to_be_a_season_2_of_abyss_kdrama.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/dudefalunelotatozini.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f40e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40E 5728 bytes
SHA-256: ebe33f26f967e52e17f6ef31210c3d33bc61bb7bf5f61380e686d20364e2e40d
font_01_sfnt_off0001079b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079B 10664 bytes
SHA-256: af275af4d16cb0b2d715c551dbf2bb658819bdb2df381a3cc371e54c95dc2b37

Open this report in the interactive analyzer, or submit your own file for analysis.