Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0d89dc421778daa…

MALICIOUS

PDF

64.3 KB Created: 2021-02-15 20:05:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 041e9b0ce01a803ba88fbecd37747957 SHA-1: 74c99eddcf26c814d20b88afbaf404e4128c41da SHA-256: a0d89dc421778daa36f6ebe62bd2891ba50a363403563253e874d7992fc63603
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, a common tactic for phishing or distributing further malware. The embedded URLs, such as 'https://bologen.ru/123?utm_term=access+point+outdoor+ubiquiti+nanostation+%2528loco+m2%2529+wireless+n150', likely serve as the primary mechanism for user interaction and potential compromise.

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://bologen.ru/123?utm_term=access+point+outdoor+ubiquiti+nanostation+%2528loco+m2%2529+wireless+n150 PDF link annotation
    • http://ig-objectionform.com/lagu_bandung_lautan_api_versi_reggae9s835.pdfIn PDF document text
    • http://reduslimitaly-official.website/509534304292m2iy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387244/normal_5fe2bfc8aef28.pdfIn PDF document text
    • http://boost-store.net/11490378202f503e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393790/normal_60185015af3bc.pdfIn PDF document text
    • http://jewlgems.com/bajrangbali_ka_wallpaperlgb5s.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393036/normal_6028e73dc423f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495707/normal_5fc917a6dd23d.pdfIn PDF document text
    • http://getsalon.xyz/how_many_points_do_you_have_on_a_south_carolina_drivers_licensels0sm.pdfIn PDF document text
    • http://mattelipsticks.site/download_the_weather_channel_app_pleaseh5jvx.pdfIn PDF document text
    • http://retys.space/lifixutidf3tj.pdfIn PDF document text
    • http://all-host.site/my_talking_tom_2_mod_iosrwmb8.pdfIn PDF document text
    • http://wawimetuboze.iblogger.org/acute_asthma_guidelines_pediatrics.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ketolukimozol.epizy.com/38008215739.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_off0000baa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAA6 6168 bytes
SHA-256: caecf6a4997fc4d034b4f1d264fa8c7a7497f4b4865b35facbb05a4f76d98a48
font_01_sfnt_off0000cfb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFB1 10776 bytes
SHA-256: 66d2756f6193c00ca2d8973a35cf3272c429455c0fb2c3605c217c2808ba770d

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