Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eb408dcd456ddd3…

MALICIOUS

PDF

74.0 KB Created: 2021-03-20 18:54:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: d2bc4bf6b12a52cbf745c6ceafab2e1e SHA-1: 0c50779d3941826f6185c801904397f98e0280e7 SHA-256: 7eb408dcd456ddd381ead202c78aa9889d7bd5d8323d63c254250209378a2cd5
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a likely phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were extracted, the embedded URLs are the primary indicators of compromise, directing users to potentially harmful 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://druttle.ru/wix?keyword=yorknew+city+arc+explained PDF link annotation
    • http://rotukefune.getenjoyment.net/march_general_awareness_2020.pdfIn PDF document text
    • http://petrol-v-pol-price.site/multiple_regression_analysis_spss_data_setlgjpq.pdfIn PDF document text
    • http://muzhskoizhurnal.ru/12243185725sr16h.pdfIn PDF document text
    • http://luwinilulurop.mywebcommunity.org/46484357427.pdfIn PDF document text
    • http://ig-copyrightnotice.com/valatollronh.pdfIn PDF document text
    • http://shoop-fg.ru/kupidanogafslab1.pdfIn PDF document text
    • http://spainwow.pro/how_is_the_100_book_different_from_the_show8v7wn.pdfIn PDF document text
    • http://taforojujutusig.mygamesonline.org/wudokuxinazunovowufitamuz.pdfIn PDF document text
    • http://vandify.com/manimejaxavx1ia7.pdfIn PDF document text
    • http://biomaniix.website/siwiziniwutoq6ygq.pdfIn PDF document text
    • http://wamabivunufoteg.medianewsonline.com/bepul.pdfIn PDF document text
    • http://center-san.ru/movie_counter_kabir_singhcogrn.pdfIn PDF document text
    • http://idealsit.fun/pefuwewatejofutajozerr82r5.pdfIn PDF document text
    • http://vanimerukaguto.scienceontheweb.net/writing_ability_definition.pdfIn PDF document text
    • http://nanonewe.scienceontheweb.net/do_you_have_to_bake_a_pound_cake_in_a_bundt_pan.pdfIn PDF document text
    • http://netlysy.online/124987346121nkr2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zazaluvuzusu.rf.gd/jawutapuvekajit.pdfIn PDF document text
    • http://jopiwutiz.epizy.com/lujixidiviresis.pdfIn PDF document text
    • http://gofosuxubajo.epizy.com/webcompanion._ui._appcore._services._installer_service.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_off0000e510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE510 5176 bytes
SHA-256: 0bded85d5fccdb09295e116d4498a4572f02a7d7ba4f713ca96f980c401d7963
font_01_sfnt_off0000f6df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DF 10560 bytes
SHA-256: 1c949db8ec008d37ce9e0e2df0c983d68f501eaead91553fff019ea911c853c4

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