Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e9ad7593728766d…

MALICIOUS

PDF

99.4 KB Created: 2021-02-21 00:45:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: fa426a9386ef8f8875febd8a222ae6f4 SHA-1: 7864fa2ffa2173ed1c351689893461ed45445e56 SHA-256: 0e9ad7593728766d346d1ee4278a574174341a822db551464ef369eefe736e72
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. ClamAV detection and ML classification strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity, likely leading to a second-stage download or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/strik?utm_term=critical+race+theory+definition+quizlet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4407777/normal_5ff0790e631ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491169/normal_5fd60c5ea0ee4.pdfIn PDF document text
    • http://laxelenokuro.22web.org/fitted_sheet_small_double_bed.pdfIn PDF document text
    • https://voropulunonuz.weebly.com/uploads/1/3/5/3/135316946/6247124.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392463/normal_5ff0040e1f2b2.pdfIn PDF document text
    • http://remont-pc.website/10954054151u5fug.pdfIn PDF document text
    • https://lopiranurepo.weebly.com/uploads/1/3/4/7/134735856/5854590.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377379/normal_5fd627d705b8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447267/normal_6018ae82a3407.pdfIn PDF document text
    • http://vatologox.iblogger.org/litijefereg.pdfIn PDF document text
    • http://hopecommunitynaz.com/describe_the_reconstruction_plans_for_presidents_lincoln_and_johnsonu4duo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416316/normal_5ff8b8a20ebc3.pdfIn PDF document text
    • http://tevfikyuce.xyz/ice_cream_shops_hiring_at_15_near_me1whv9.pdfIn PDF document text
    • http://makukenumeg.22web.org/cartoon_2018_movie.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380887/normal_5fd0fe8d9bc3e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://duvexarido.epizy.com/masimo_signal_extraction_pulse_oximetry.pdfIn PDF document text
    • http://suluzisose.rf.gd/chia_s_mng_wifi_trn_android.pdfIn PDF document text
    • http://kefekebew.rf.gd/the_bluest_eyes_in_texas_cover.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12945 3968 bytes
SHA-256: 866d2638d75079aa8adbae6e1422ac5a682fd7d64a2f8c18dd3ea586caac0dcd
font_01_sfnt_off0001375e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1375E 5112 bytes
SHA-256: b3c575fbfd9f3d80ad9911e46dfc880787c89e0523b40330ea2463ec27144084
font_02_sfnt_off000148c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148C0 12284 bytes
SHA-256: 83f6c5a604aa5aef68e0e7047cc36c5096570f16eb52465e0308b6d1023db9bb
font_03_sfnt_off0001717f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1717F 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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