Malicious PDF — malware analysis report

Static analysis result for SHA-256 c343725c361a4e8e…

MALICIOUS

PDF

74.5 KB Created: 2021-02-27 05:22:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 426e5826d7f2bc2f89180b07d21d0bb4 SHA-1: ce8e0222e38f596ac421e98a736bacb72cc1aaf1 SHA-256: c343725c361a4e8e28c86c8db4e71b9e96424e87fa24390cbebff16875ecd8dd
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to 'https://yafferge.ru/wix?keyword=lady+has+stroke+on+live+tv'. Another heuristic indicates the PDF is a link farm on disposable hosting. The ML classifier and ClamAV also flagged this as malicious, suggesting a phishing or malware distribution attempt.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=lady+has+stroke+on+live+tv In PDF document text
    • http://geekcods.com/download_coreldraw_x6_full_crack1ni53.pdfIn PDF document text
    • http://5coupons.info/rosenajuvibotafeduzisepybtm.pdfIn PDF document text
    • https://cdn.sqhk.co/nuditufu/gdPjjji/nail_bits_for_efile.pdfIn PDF document text
    • http://gekodejevotug.medianewsonline.com/6262967886.pdfIn PDF document text
    • http://uose.xyz/31265790204psyzz.pdfIn PDF document text
    • http://workshop-fb.ru/5286677589b1k2q.pdfIn PDF document text
    • http://org-fruit.space/20561355743i3awd.pdfIn PDF document text
    • http://proba7.xyz/what_species_is_ahsoka_tano5zmup.pdfIn PDF document text
    • http://hopecommunitynaz.com/crossway_esv_study_bible_large_print_genuine_leather_blackwsifb.pdfIn PDF document text
    • http://itali-big.space/40238262599gqxu3.pdfIn PDF document text
    • http://copyrightnotice-ig.com/wozinabijavifagac3s5.pdfIn PDF document text
    • http://thecet.xyz/vodijugutijujemewunuzoue9uu.pdfIn PDF document text
    • http://clebohets.xyz/desolezuf00jv1.pdfIn PDF document text
    • http://sipipewawezizuf.getenjoyment.net/50893050641.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kofaxafogi.myartsonline.com/nebafewezufizepesawoma.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/cambridge_learner_s_dictionary_english-_turkish_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/stacked_waterfall_chart_template.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/ctet_2019_syllabus_in_english.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_off0000e6d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D7 5080 bytes
SHA-256: 53f160312f59d376da437586fc760660b6f5e59f84b1a3260e1b7eda81f27a4e
font_01_sfnt_off0000f825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF825 10644 bytes
SHA-256: 8962287d4af0da6735ce1488f2bea5722d9d25b7e10577aa908e790992c6e9f9