Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d4adb6a97003ccb…

MALICIOUS

PDF

70.5 KB Created: 2021-02-22 09:18:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 0df773d00f69aa79a7c095d6aa912d19 SHA-1: 773c0e0e6f9b332b719a159d60604041cf72e339 SHA-256: 6d4adb6a97003ccb3137a5d71bde6378f89735db11573037ebae0b284ff234ab
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically linked to a search query for printer ink replacement, suggesting a lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links are characteristic of malicious documents designed to redirect users to harmful sites.

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
  • 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=hp+photosmart+7520+change+ink+cartridges PDF link annotation
    • http://idealslim-italiaoficial.site/92159210285nb4oz.pdfIn PDF document text
    • http://detonic-shop.website/mudelekogazazibasibisegebxjcy.pdfIn PDF document text
    • http://huaweistoreukr.xyz/invasion_modern_empire_hack_apkryl1s.pdfIn PDF document text
    • http://jobware.pro/lambeth_walk_piano_sheet_musicup908.pdfIn PDF document text
    • http://fortuneocredit.com/930030602304a2oe.pdfIn PDF document text
    • http://rezotu.xyz/championship_manager_2010_android_apkhf7zx.pdfIn PDF document text
    • http://pafekusiwajida.66ghz.com/24837927852.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://magomodatibotu.epizy.com/baal_veer_returns_1st_episode.pdfIn PDF document text
    • http://fusezumapaj.epizy.com/lg_refrigerator_customer_care_number.pdfIn PDF document text
    • http://fibubaxuvuvixik.epizy.com/48143010754.pdfIn PDF document text
    • http://topagujowulefe.epizy.com/all_feeling_songs.pdfIn PDF document text
    • http://wagadepepixapu.epizy.com/lijerawewavinurexuf.pdfIn PDF document text
    • http://pixuxurarosu.epizy.com/xejipinajew.pdfIn PDF document text
    • http://tawajopawizapa.rf.gd/spatial_reasoning_test_with_answers.pdfIn PDF document text
    • http://dufakukin.rf.gd/can_you_alexa_app_on_computer.pdfIn PDF document text
    • http://dimebuturerab.epizy.com/jodofikagutakasi.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_off0000d5e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E9 5960 bytes
SHA-256: e5fdadd6965f5cc81cd6b6e686554e2bdf6e2643de61d35b56c01679048fee2e
font_01_sfnt_off0000ea10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA10 10136 bytes
SHA-256: 38b4bf50d4ea1147b744f0d0736791932fbabc853a38a8c291f962342e944a48

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