Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aace397b75681b9…

MALICIOUS

PDF

81.3 KB Created: 2021-02-25 12:40:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 1ebdc3a159910f33a32ae1651ec64856 SHA-1: f2197799a80417251d9d8de291c6a5c34a1b5090 SHA-256: 4aace397b75681b96e36ce52516506a094be32900c91d0ace0d8f02277c8d62a
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm used for phishing or distributing further malware. The presence of embedded URLs and the structure of the PDF indicate it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/strik?utm_term=hp+officejet+pro+8600+copy+problems+lines PDF link annotation
    • https://tupetipu.weebly.com/uploads/1/3/4/4/134489263/9177363.pdfIn PDF document text
    • https://rikelakejif.weebly.com/uploads/1/3/4/8/134885243/jipuxagi.pdfIn PDF document text
    • https://fumitalabojaluk.weebly.com/uploads/1/3/5/3/135399187/pazuwikokatedobe.pdfIn PDF document text
    • http://gejokakop.mygamesonline.org/medarebisepipuwedafumax.pdfIn PDF document text
    • http://luwogexejel.getenjoyment.net/57917017958.pdfIn PDF document text
    • https://zemotererozo.weebly.com/uploads/1/3/0/7/130738962/pudazilaku.pdfIn PDF document text
    • https://kovuvewu.weebly.com/uploads/1/3/2/6/132695697/08e3525ff0.pdfIn PDF document text
    • https://rofexigu.weebly.com/uploads/1/3/0/7/130738805/2704c606d93a675.pdfIn PDF document text
    • https://tazipapanora.weebly.com/uploads/1/3/0/7/130776418/7431449.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pelebirepopo.onlinewebshop.net/what_does_the_consolidated_omnibus_budget_reconciliation_act_of_1985_allow_an_employee_to_do.pdfIn PDF document text
    • http://nabenejajoko.myartsonline.com/soundcraft_ui24r_manual_cz.pdfIn PDF document text
    • http://fuvarijes.atwebpages.com/what_are_good_topics_of_conversation.pdfIn PDF document text
    • http://rosajeku.myartsonline.com/99905024538.pdfIn PDF document text
    • http://gaxilitexu.onlinewebshop.net/how_to_program_a_ge_universal_remote_to_a_orion_tv.pdfIn PDF document text
    • http://laxaguwen.epizy.com/belmont_school_harrow_uniform.pdfIn PDF document text
    • http://begagebo.epizy.com/caterpillar_3512b_generator_manual.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_off0000ff9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9D 5720 bytes
SHA-256: cf1a7a6a3481bc69deefb17e77da35d694d6b90a7666e4db04c4637387556529
font_01_sfnt_off00011315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11315 10716 bytes
SHA-256: 6461a71da00b747b00728fd3edf056a4b3c49a793c60a95e07aff4b7bc5294f5

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