Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0283adf240f6f4e…

MALICIOUS

PDF

64.2 KB Created: 2021-03-30 22:32:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: bb377bca5949d71b7430c702c784956d SHA-1: 9ce586b3ff11255891a0d5c9fc6661c10d41726e SHA-256: d0283adf240f6f4e7ff5b3ad706f60dc02948451b01df0dd94b68084e56f6cf4
184 Risk Score

Malware Insights

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

The PDF file was identified as malicious by multiple heuristics and an ML classifier, specifically flagging it as a redirector to malicious infrastructure. The document contains a large number of embedded URLs pointing to disposable domains, suggesting a phishing or scam campaign. While no scripts were extracted, the nature of the embedded links and the PDF structure strongly indicate an attempt to redirect users to malicious 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
  • 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://crophysi.ru/wix?keyword=oblivion+ps3+manual+pdf In PDF document text
    • http://serdyukov.pro/manageengine_servicedesk_plus_9._4_admin_guideb3kyd.pdfIn PDF document text
    • http://yogist.fun/bekovoragikewidapaaa4b.pdfIn PDF document text
    • http://gemajelibetojup.scienceontheweb.net/73278203926.pdfIn PDF document text
    • http://ionatr.space/kuviditugz2gl.pdfIn PDF document text
    • http://fawejidiribap.22web.org/nitisunitanuretel.pdfIn PDF document text
    • http://malarusexomobaf.22web.org/44163265214.pdfIn PDF document text
    • http://zulukaruwi.22web.org/demiwotafugokobabiv.pdfIn PDF document text
    • http://bimatixazokepox.22web.org/importance_of_branding_and_packaging.pdfIn PDF document text
    • http://fegokodelaxen.scienceontheweb.net/buku_akuntansi_dasar_untuk_pemula.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372361/normal_605930f1aca88.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369763/normal_6008c0ebac8ea.pdfIn PDF document text
    • http://getegenufiduso.66ghz.com/bsa_uniform_badge_placement.pdfIn PDF document text
    • http://pilevisuzo.iblogger.org/mipixamitanukuturar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jiditorugap.epizy.com/ludedumikotut.pdfIn PDF document text
    • http://libizutuxe.rf.gd/appendiceal_abscess.pdfIn PDF document text
    • http://tagijonegularol.myartsonline.com/where_is_record_button_on_dish_remote.pdfIn PDF document text
    • http://tutunod.epizy.com/adventurers_league_magic_item_certificates.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_off0000be30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE30 5484 bytes
SHA-256: df76deb7cb5943ccebde695bfe88ab61967b4422a688529bf0eda9ea63eec3ad
font_01_sfnt_off0000d0c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C1 10232 bytes
SHA-256: f1f8e53863402722b8b2eba44e444ce7c2a6a32f6c7f374c3658801127aca207

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