Malicious PDF — malware analysis report

Static analysis result for SHA-256 09ed5282b829b0e4…

MALICIOUS

PDF

97.8 KB Created: 2021-03-29 10:46:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 1364fb97c38348b10d8bbf6a5c0625eb SHA-1: ca405a80835c1ee1066a7b80b5baaa16f41b3e1d SHA-256: 09ed5282b829b0e4ba46b622c1e3a8a9b9960a1b1319631cb2b15d1cefa9a719
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/award?keyword=warhammer+40k+8th+edition+eldar+codex+pdf PDF link annotation
    • http://devivitonewe.sportsontheweb.net/cetoprofeno_100mg_medley_bula.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450427/normal_5ffe6c3a0c7bf.pdfIn PDF document text
    • https://talosemes.weebly.com/uploads/1/3/4/4/134494853/6378256.pdfIn PDF document text
    • http://sesizuxewewax.mygamesonline.org/birthday_girl_penelope_douglas_free.pdfIn PDF document text
    • http://rugegav.mywebcommunity.org/fijatawititakedetuvufamin.pdfIn PDF document text
    • http://gejesixave.scienceontheweb.net/lev_grossman_the_magicians_book_order.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448121/normal_5fc989abf001d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501794/normal_5fcbbeb92021d.pdfIn PDF document text
    • http://nadipewin.mywebcommunity.org/jivoretob.pdfIn PDF document text
    • https://wegonugu.weebly.com/uploads/1/3/4/0/134040733/xikegalumomeros.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0f1af67-e6be-46d1-99cc-fcde3753327a/8937158514.pdfIn PDF document text
    • http://nomamazuzut.atwebpages.com/53938480460.pdfIn PDF document text
    • http://zilowovuv.atwebpages.com/pitukadifo.pdfIn PDF document text
    • http://nevegeb.rf.gd/77495829255.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f1447f3-9f27-4728-9624-5936b68a6aa0/3422374631.pdfIn PDF document text
    • http://tisigivikevutik.rf.gd/8113545619.pdfIn PDF document text
    • http://vinarudafolu.epizy.com/paradise_lost_book_4_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faa14117-8b88-4ab9-8ad9-6126e5fd0959/50011672800.pdfIn PDF document text
    • http://dikuwipesunebo.rf.gd/andromaque_racine_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e345cde-5f13-4497-9bfc-16a2edfd0fa8/the_koran_or_quran.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/febe16f2-e513-4421-a41d-0d7389728590/nivivodulu.pdfIn PDF document text
    • http://zilazop.rf.gd/what_is_the_meaning_and_example_of_literary_nonfiction.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_off00013cc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CC5 5788 bytes
SHA-256: 0a2b88eaa47ae896f5c43b1ec5094fae08deba0cdbc37d0c1b43db65de66e9d5
font_01_sfnt_off00015069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15069 11720 bytes
SHA-256: 09174fc51ddb89de9979d0e320b9469f833fd91683cfc12638e1876952370266