Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e525120bab21bd9…

MALICIOUS

PDF

93.6 KB Created: 2021-03-27 10:07:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 958d175d521e217527f6dba36f234635 SHA-1: 1cb7f32edaadd114aaf6179a6ca0ee28d65c209e SHA-256: 9e525120bab21bd903ed228a5cb449080a06b290d00c0c0e73920a32439c7c63
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • 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 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://resalured.ru/strik?utm_term=our+man+in+havana+movie+online+free PDF link annotation
    • http://reborasiruv.iblogger.org/329553465.pdfIn PDF document text
    • https://wexemexaxixu.weebly.com/uploads/1/3/4/7/134709907/5796429.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388271/normal_6003c29cf3982.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469827/normal_6025b0fe5ed92.pdfIn PDF document text
    • https://foderojev.weebly.com/uploads/1/3/4/0/134041652/4cb794df139424.pdfIn PDF document text
    • https://bazeneta.weebly.com/uploads/1/3/0/8/130813787/fejenuzaj-sexus-vusawuxodoxovam-fikewixilew.pdfIn PDF document text
    • http://pavozuketogo.mygamesonline.org/15595528723.pdfIn PDF document text
    • http://limavirom.22web.org/anemia_megaloblastica_tratamento.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478127/normal_5fcd37d208711.pdfIn PDF document text
    • http://pozezan.mygamesonline.org/kijogudimotolix.pdfIn PDF document text
    • http://pasoxegidameso.iblogger.org/android_studio_set_text_bold_programmatically.pdfIn PDF document text
    • https://xitupiwe.weebly.com/uploads/1/3/4/4/134489196/2025845.pdfIn PDF document text
    • https://webegerux.weebly.com/uploads/1/3/4/7/134759049/rolaxojisovanod.pdfIn PDF document text
    • http://remigajapalogu.22web.org/how_to_find_the_mass_of_atoms_in_an_element.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404755/normal_5fd072378d79d.pdfIn PDF document text
    • http://vidapabil.22web.org/ubicacin_de_arequipa_en_el_mapa_del_per.pdfIn PDF document text
    • http://juwoniki.getenjoyment.net/91455026401.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8f6f9f04-f977-4239-955d-f6aecf2dd879.filesusr.com/ugd/81cd61_1abcbb6a1daa41feb077e370dd8636d7.pdf?index=trueIn PDF document text
    • https://80820154-e864-4b0c-832b-212b24169927.filesusr.com/ugd/c12414_9a388c10af8d473489b7f89c40460d6c.pdf?index=trueIn PDF document text
    • http://puxebipupaluna.rf.gd/supplementary_and_complementary_angles.pdfIn PDF document text
    • http://gitinilu.epizy.com/fuvijupovum.pdfIn PDF document text
    • https://43fe4710-460a-4ad3-90dc-2dd795c51528.filesusr.com/ugd/a32c20_70d7bab4f7a14936a2de81f545fc4fdf.pdf?index=trueIn PDF document text
    • https://07e0a16e-b77d-475b-b724-88bbaedb347c.filesusr.com/ugd/8e9e2f_afaa0e85524a4cc1a9b1cc8507a75daf.pdf?index=trueIn PDF document text
    • http://davinawoguzag.atwebpages.com/57203324987.pdfIn PDF document text
    • http://vijelovisisojo.rf.gd/rinokafazoko.pdfIn PDF document text
    • http://warozuvade.epizy.com/lolukolegunewadelosa.pdfIn PDF document text
    • https://b64dd490-e5b9-492f-89ff-e398ecee904c.filesusr.com/ugd/5926b4_42edc26daac64b57b72cbe6a3de5fb40.pdf?index=trueIn PDF document text
    • http://tibamupebunod.atwebpages.com/bonnes_pratiques_de_fabrication_document_de_rfrence_version_3._0.pdfIn PDF document text
    • http://kopididutal.epizy.com/85846999757.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_off0001323e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1323E 4916 bytes
SHA-256: ed2d1f50deb37ab45e4404017f5c051b916ff823e5c7f6bb9e73579f6396c95a
font_01_sfnt_off000142d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142D1 11396 bytes
SHA-256: 427d9dca36d34555c3822a04016fc4d8b43a18d44a830accd696a1713a531ac8