Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e9a581700bdfe85…

MALICIOUS

PDF

75.2 KB Created: 2021-03-02 00:19:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: cf26b6a354b3c168fc0103e0f93e8d5d SHA-1: cae830d5a085bc0a0dcf10717bce89f0f3fc268f SHA-256: 1e9a581700bdfe85df693d75931b5b32e29caadf5accd6e801a614e78bf8b221
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed to redirect users to potentially harmful websites.

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://jacksth.ru/strik?utm_term=stihl+ms310+chainsaw+parts+diagram PDF link annotation
    • http://tufuwavaziga.mygamesonline.org/73387190525.pdfIn PDF document text
    • https://cdn.sqhk.co/xororofomed/M9jhQS9/selling_on_etsy_in_texas.pdfIn PDF document text
    • http://vijevejumozugim.sportsontheweb.net/50_shades_of_gray_2_on_netflix.pdfIn PDF document text
    • http://vizilirudigub.getenjoyment.net/old_school_hip_hop_dance_names.pdfIn PDF document text
    • http://bixaxivajujojar.mypressonline.com/wordpress_website_build_cost.pdfIn PDF document text
    • http://sixesijilolun.mywebcommunity.org/maxenodivefodosakuvirul.pdfIn PDF document text
    • http://top-salez.site/rusewuxabavija5w2zz.pdfIn PDF document text
    • https://cdn.sqhk.co/tizudukokeni/hcv1Ljf/gravity_jump_sotn.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwopaperuv/KSgfJyw/wipedigefixewivedikoj.pdfIn PDF document text
    • http://mazers.fun/rulixujinotobfp6ku.pdfIn PDF document text
    • http://werenntaq.online/fedex_drop_off_downtown_omahassq5w.pdfIn PDF document text
    • https://cdn.sqhk.co/nenafodud/ge5gk4V/fodakit.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/38239177989.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/LdjeSml/reset_fire_alarm_button.pdfIn PDF document text
    • http://esmoney.site/nivolekuwogor8qw.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/gumagabu/anaganaga_oka_roju_telugu_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/18691158582.pdfIn PDF document text
    • http://kadoxosin.atwebpages.com/44948611239.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_off0000da87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA87 5600 bytes
SHA-256: e68be1d5cc28b2d75a806f663f101a3082275ff65fd5f9ac5bb93c7a98b43b3d
font_01_sfnt_off0000ed62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED62 10468 bytes
SHA-256: 747588904d7f0ac1d99a88c6eda5be03c8f0dc4afe6930ecb59bf4f9811b9541
font_02_sfnt_off00011110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11110 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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