Malicious PDF — malware analysis report

Static analysis result for SHA-256 28fd1ea280f7573d…

MALICIOUS

PDF

62.2 KB Created: 2021-02-10 04:19:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 29ddcdedd2bcb13fed47e64172a0eca0 SHA-1: d05085561a8d441a3382b44d651f23f5f8dce57c SHA-256: 28fd1ea280f7573d3512877b991dc235094473e801a8c8c1e66f6598999119b9
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or link farms, 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 consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/aws?utm_term=personal+information+synonyms PDF link annotation
    • http://lg-copyright.com/gilokemy8gi4.pdfIn PDF document text
    • http://skameyki.club/manualidades_con_botellas_de_cristal9q7fl.pdfIn PDF document text
    • http://cafe-cok.ru/4n1k_kitap_indirr79gl.pdfIn PDF document text
    • https://cdn.sqhk.co/darekomeguv/hauTYgj/manager_tools_interview_questions.pdfIn PDF document text
    • https://cdn.sqhk.co/jawezumate/hFqUghO/raketuwukafunilasasabazim.pdfIn PDF document text
    • https://cdn.sqhk.co/zedawuzijis/iiielC4/78602066345.pdfIn PDF document text
    • https://cdn.sqhk.co/jogowijalaro/z18gcLF/91590870371.pdfIn PDF document text
    • http://erogan-oficial.site/aaron_neville_crazy_lovebt93g.pdfIn PDF document text
    • https://cdn.sqhk.co/guzowozuk/iohdidP/20448035805.pdfIn PDF document text
    • https://cdn.sqhk.co/jamolipa/gfjfM6D/angel_avatar_dress_up_games.pdfIn PDF document text
    • https://cdn.sqhk.co/vipikunowi/hbTjbyK/pojamedojalerutajeniz.pdfIn PDF document text
    • https://cdn.sqhk.co/doxufojixene/8oWeihf/check_my_bill_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rizigive.epizy.com/veronica_netflix_hd.pdfIn PDF document text
    • http://getetir.epizy.com/possessive_pronouns_worksheet_for_grade_3.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/fagisetufakajogoj.pdfIn PDF document text
    • http://lajuloverebob.epizy.com/21030471737.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/a_current_affair_reporters_martin_king.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b6f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6F8 5016 bytes
SHA-256: 8006804172b17630abea17da1798712390b552ff9f63fe58c0154a279dba7b43
font_01_sfnt_off0000c7f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F9 10660 bytes
SHA-256: af8e19dc87bbb96e8eec739484eeb72144121e0469ff1c1e9cd14365d0e5dbb4

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