Malicious PDF — malware analysis report

Static analysis result for SHA-256 694a233ce61ff07d…

MALICIOUS

PDF

77.7 KB Created: 2021-03-14 07:58:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 63498abc9652bcfaef2ebac7c24f4767 SHA-1: 23ec64d2dc0a9a86751c95e853db0fcfbb952bb8 SHA-256: 694a233ce61ff07d8577e1806d9ea126309258f39444ec0d1b48dae321d4e171
184 Risk Score

Malware Insights

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

This PDF file contains multiple embedded URLs that point to known malicious redirector infrastructure and disposable hosting sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of embedded URLs suggests an attempt to lure the user to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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/123?utm_term=cariloha+sheets+pilling In PDF document text
    • http://covidcapsule.world/69179905550418cy.pdfIn PDF document text
    • http://lorewipa.scienceontheweb.net/42032277492.pdfIn PDF document text
    • https://wezogefizu.weebly.com/uploads/1/3/4/2/134234847/5414294.pdfIn PDF document text
    • http://luwogexejel.getenjoyment.net/wamupijavewex.pdfIn PDF document text
    • https://kenaveduku.weebly.com/uploads/1/3/0/8/130813649/sovosovusuboxegogi.pdfIn PDF document text
    • http://morasuxod.getenjoyment.net/how_to_determine_the_size_of_a_chainsaw_chain.pdfIn PDF document text
    • http://hocostyle.ru/centroids_integral_calculus_examplesuf2pj.pdfIn PDF document text
    • https://cdn.sqhk.co/famagafe/FYmhiBw/21387320696.pdfIn PDF document text
    • https://jiludagurifo.weebly.com/uploads/1/3/4/3/134349737/471459.pdfIn PDF document text
    • http://pannochki-art.com/149528159242ln4e.pdfIn PDF document text
    • http://damita.fun/xosatagolekinidesabite0icnn.pdfIn PDF document text
    • http://nokasosozigof.mypressonline.com/alex_rider_season_2_episode_1.pdfIn PDF document text
    • https://cdn.sqhk.co/jimatoju/ehdA72n/hospital_infection_control_guidelines_2019.pdfIn PDF document text
    • http://sellamorem.com/how_to_pay_for_a_ticket_online_in_californial3q27.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/s9jaGgd/83245584019.pdfIn PDF document text
    • https://fufopijubotuxo.weebly.com/uploads/1/3/1/3/131381544/62f134a.pdfIn PDF document text
    • http://brumbum6.xyz/extreme_asphalt_car_racing_2019el718.pdfIn PDF document text
    • http://lufavometazajur.iblogger.org/abdul_kalam_books_in_hindi.pdfIn PDF document text
    • http://rewita.fun/rehabilitacja_po_endoprotezie_stawu_biodrowegof8gwe.pdfIn PDF document text
    • https://kumobavubisu.weebly.com/uploads/1/3/0/7/130775432/zanujotoze.pdfIn PDF document text
    • https://cdn.sqhk.co/meradipuwiz/ih9ifqy/18026552640.pdfIn PDF document text
    • https://cdn.sqhk.co/wamiratena/g170cqj/alouette_ce1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sufapanizesemot.epizy.com/ragumemomisebakidik.pdfIn PDF document text
    • http://vazibitadunowak.epizy.com/the_wu_tang_manual_free_download.pdfIn PDF document text
    • http://benamow.myartsonline.com/samsung_galaxy_tab_2_7.0_gt-p3113_case.pdfIn PDF document text
    • http://tedipokexumo.epizy.com/bubble_bobble_xbox_360.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_off0000f442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF442 4988 bytes
SHA-256: 7396f8f4fc41d1842260b7b456600e395b271e5b45dfa63e2c0f49729943242b
font_01_sfnt_off0001052d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1052D 10220 bytes
SHA-256: a920b4084891f957dd0397fae12c3df3a30a8de6e29228bc99df36f7264665c4