Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eb218495b2da041…

MALICIOUS

PDF

106.4 KB Created: 2021-02-26 08:26:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: c08a63cae7f59f155056bfabfa6ae7c4 SHA-1: d095221ff679cb09eefa63482b8eae876bba9eac SHA-256: 3eb218495b2da0412c9b852151c6dc4c20f67b6004efb7e9f9465c94118b0e7b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://druttle.ru/wix?keyword=hp+battery+k104 PDF link annotation
    • http://jipujitematane.iblogger.org/uniform_admission_rules_nsw.pdfIn PDF document text
    • http://veruvipavopa.getenjoyment.net/wexusewipibamaxiv.pdfIn PDF document text
    • http://jalazekesofijot.medianewsonline.com/a_dolls_house_free.pdfIn PDF document text
    • http://vuzisebepuda.iblogger.org/bodakoxi.pdfIn PDF document text
    • http://winovigamaj.mygamesonline.org/fakojuzixanaxadola.pdfIn PDF document text
    • http://warixedivukinat.mygamesonline.org/431814798.pdfIn PDF document text
    • http://dosaxixapaxa.medianewsonline.com/gajubo.pdfIn PDF document text
    • http://lumobumekola.getenjoyment.net/cuisinart_electric_fondue_set_power_cord.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rodedewezijore.atwebpages.com/microsoft_excel_projects_for_beginners.pdfIn PDF document text
    • http://viruvivena.epizy.com/abceso_perianal.pdfIn PDF document text
    • http://duzesonugineku.rf.gd/65207151146.pdfIn PDF document text
    • http://pipademepazofex.epizy.com/how_to_make_a_taurus_man_pursue_you.pdfIn PDF document text
    • http://rogofideb.onlinewebshop.net/76488242090.pdfIn PDF document text
    • http://volawiruzajul.rf.gd/chinese_movie_er_app.pdfIn PDF document text
    • http://novizazabejapi.epizy.com/dagibabogidupiwam.pdfIn PDF document text
    • http://gijomifede.rf.gd/vidmate_apk_mirror_new_version.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_off0001654f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1654F 5152 bytes
SHA-256: 4e79a6af38b69ff5c7a0a8c9ca16c4b795b97d22c94e2324c716b80e3acb3a9f
font_01_sfnt_off000176f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176F1 10660 bytes
SHA-256: 1f5deb2c4f1c007fb24888535a818608778f001135dc12a2f5d7c1dff029ee73

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