Malicious PDF — malware analysis report

Static analysis result for SHA-256 036074ac4f463084…

MALICIOUS

PDF

178.4 KB Created: 2021-03-13 18:24:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 48910069f22230d403810275a63ac92e SHA-1: 6f0f1e59db4e823b14e7977e452d1e5fba8b5cd2 SHA-256: 036074ac4f4630846bb65de010993c3495868fb9952235c4660b36c94017dd84
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs and heuristics indicate it functions as a link farm, directing users to potentially malicious domains. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of an attempt to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://jacksth.ru/award?keyword=sumerian+cuneiform+pdf PDF link annotation
    • http://guroxufe.iblogger.org/58551261703.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393911/normal_5ffd64dcdde80.pdfIn PDF document text
    • http://copyrightshelpscenters.com/390540505179kkud.pdfIn PDF document text
    • http://kovatawuwaluxud.iblogger.org/up_deled_syllabus_2020.pdfIn PDF document text
    • http://fastnoutservice.ru/parents_as_partners_policy_early_yearsfmdke.pdfIn PDF document text
    • http://ccckkkkk.space/84282193282takx3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481400/normal_600884e3005ef.pdfIn PDF document text
    • http://kino-vezde.ru/33384533223p2bv.pdfIn PDF document text
    • http://de-bewertung-id-q2e5t23.top/minecraft_pe_apk_full_version_free_download4q6mz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413713/normal_60040ea31db76.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/friedrich_nietzsche_books_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80067479-144c-42e2-b8e5-838e1ed96099/48219101564.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fd0d141-3105-4a51-8705-a73ccad13f0f/what_is_the_salary_of_an_ethical_hacker.pdfIn PDF document text
    • http://biwewija.rf.gd/star_wars_aftermath_ita.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ae89933-48bd-4a40-9d44-7a7c18d7eedb/86145114537.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/55222862395.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/add187b9-2b08-4f28-99f8-9e86b59dcf18/95321668634.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000236a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x236A7 5716 bytes
SHA-256: ba91e27458abb07b05d293d13250cd3effee20977743ceb52916fff7a9ad808f
font_01_sfnt_off00024a53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24A53 5192 bytes
SHA-256: d4961990e8552c14b51e80deb92fb48061bc57d56e338e864bfa80f3bd340c1f
font_02_sfnt_off00025be6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25BE6 18164 bytes
SHA-256: e59ff9d022de7285f90904ef58590c8ec2a44c6c80313a8beaff440bcf2869a1
font_03_sfnt_off00028f27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28F27 16284 bytes
SHA-256: 48f3ac623c2a2f21284148e5b9bbb60e75a276a1dca846d4e86f55bff529c813
font_04_sfnt_off0002a4bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A4BD 8428 bytes
SHA-256: 58b33a50e92a6d5c1ff2aae0a791c175de515272079388a3201decb1e4ab845d