Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7a9b2843eeec855…

MALICIOUS

PDF

73.8 KB Created: 2021-02-11 15:53:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: b026261d5a7f82bff00aa9aba044b19f SHA-1: a46f02272fe11902dcaf1709882f527b2682985f SHA-256: d7a9b2843eeec85531f1dafb21238baea1d8d09530930711b7a71cad7fa31bc7
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1534 Steal Session Token T1059.007 JavaScript

The PDF document contains heuristics indicating it is a lure for multi-factor authentication or one-time code harvesting, consistent with credential phishing. It embeds external URIs pointing to suspicious domains, including one that appears to be a link farm. While no scripts were explicitly extracted, the nature of the lure suggests an attempt to steal session tokens or credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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/123?utm_term=call+of+war+1942+cheat+codes PDF link annotation
    • http://vuxokiwi.22web.org/check_your_vocabulary_for_ielts.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481403/normal_6019d263583f2.pdfIn PDF document text
    • http://summerita.fun/47186303088zjz2s.pdfIn PDF document text
    • http://antonioit.fun/all_arcade_games_in_one_app9g55t.pdfIn PDF document text
    • https://cdn.sqhk.co/kejopala/EhguRT5/prison_escape_game_answers_upper_levels.pdfIn PDF document text
    • http://antonio-ita.space/piezoelectric_stack_actuatorhirgt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502464/normal_602527a227de4.pdfIn PDF document text
    • http://24goodstore.site/west_game_app_wiki4ngf3.pdfIn PDF document text
    • http://probmaka.tech/24234860324drwyd.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/gelawiweza/13424627154.pdfIn PDF document text
    • http://dadodoserosif.epizy.com/geometric_figures_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/martyrs_full_movie_in_tamil_dubbed.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/jquery_animate_transform_example.pdfIn PDF document text
    • http://rukateridexak.rf.gd/fishing_report_cape_cod_times.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_off0000e368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE368 5536 bytes
SHA-256: 74549a7ed215d26558f482d036178f6775e9f894c877dcf2655b83f74a828ede
font_01_sfnt_off0000f64c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64C 10848 bytes
SHA-256: 95668aaba5ca40a076bba8d995459fa111959530896d0b23e0ff345f9625d3c4

Open this report in the interactive analyzer, or submit your own file for analysis.