Malicious PDF — malware analysis report

Static analysis result for SHA-256 664133e6341f0f5d…

MALICIOUS

PDF

72.8 KB Created: 2021-02-14 08:13:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 716f2487e05f6819a9dd7934bef153b7 SHA-1: 2cd976fb54566b55a912af4c55fc1ce9355ed357 SHA-256: 664133e6341f0f5df69707c1e5f346b0b463f1fbd5c9f12f156a102f88d185ff
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains multiple embedded URLs, with one prominently featuring 'mlb tap sports baseball 2017 hack', suggesting a lure for users interested in game cheats. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The presence of numerous external links on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/123?utm_term=mlb+tap+sports+baseball+2017+hack PDF link annotation
    • http://saudiautoinsurance.com/business_definition_strategic_thinking2pqdp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418574/normal_601de532c3d88.pdfIn PDF document text
    • http://antonioita.fun/limiting_reagent_worksheet_answer_key_with_workhutp8.pdfIn PDF document text
    • http://mnogoturov.com/business_games_iosfs7lx.pdfIn PDF document text
    • http://vipadminler.org/mr_bechara_songsubg7.pdfIn PDF document text
    • http://prizinsta24.space/33968958428l23ax.pdfIn PDF document text
    • http://shoop-fo.ru/kathi_movie_all_theme_musics5ud4.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/votawawo/30407396403.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/hola_vpn_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/alteryx_crew_macros.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_off0000df77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF77 5636 bytes
SHA-256: 9fae1dc7aaae04f4d2928b34abe81c1f071b0f69ce2e7669292b20b5919bf546
font_01_sfnt_off0000f2aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AA 10688 bytes
SHA-256: ef8c6aa68d2230292466e90d1620ea882c5a9c5d76d593996301fa54d32690c8

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