Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff1affe2d0e4e9e4…

MALICIOUS

PDF

73.0 KB Created: 2021-06-08 05:19:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 8711d104274e49643b12b0876df3a3bb SHA-1: 4182769b8f5267123e75ad6ba1ceb476261cfd19 SHA-256: ff1affe2d0e4e9e45398cf4d929c63e770b1767b51a5a276e96282ad79f39a58
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains references to 'Caddo parish sheriff's office' and is associated with a URL that also mentions the sheriff's office, suggesting a phishing or social engineering lure. The presence of numerous external URIs, many pointing to link farms on disposable hosting, further supports a malicious purpose, likely to redirect users to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://medvor.ru/pbw?utm_term=caddo+parish+sheriff%2527s+office PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4452157/normal_60622a68627b8.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4468831/normal_60b000dd6c950.pdfIn PDF document text
    • https://pawawejovotete.weebly.com/uploads/1/3/2/8/132814611/148fb4aba.pdfIn PDF document text
    • https://nutofagefisamav.weebly.com/uploads/1/3/5/9/135992035/a2270a385.pdfIn PDF document text
    • https://duzejuwilana.weebly.com/uploads/1/3/4/8/134879611/babopopajufalejesir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408589/normal_60650e442a0b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427097/normal_5fd60c95ecba1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501360/normal_601f127a4e3a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368227/normal_601ecfa042574.pdfIn PDF document text
    • https://felipivi.weebly.com/uploads/1/3/1/8/131856333/molijixalu-refat-lerogedafeluwel-jutatin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gazumadu.pbworks.com/w/file/fetch/144473187/15614456028.pdfIn PDF document text
    • http://zekodunu.pbworks.com/f/summary_of_ch_3_footprints_without_feet.pdfIn PDF document text
    • http://bezawagiga.pbworks.com/w/file/fetch/144560913/all_legendary_alpha_pack_items_2021.pdfIn PDF document text
    • http://barumena.pbworks.com/w/file/fetch/144441021/las_5_heridas_del_alma_lise_bourbeau_descargar_gratis.pdfIn PDF document text
    • http://kevuxezedila.pbworks.com/f/balanced_and_unbalanced_forces_worksheet_answers_genius_challenge.pdfIn PDF document text
    • http://xutosop.pbworks.com/f/3737459892.pdfIn PDF document text
    • http://didaneguk.pbworks.com/w/file/fetch/144427851/fanuc_series_ot_parameter_manual_download.pdfIn PDF document text
    • http://fevawigo.pbworks.com/f/16746039963.pdfIn PDF document text
    • http://negovijalulu.pbworks.com/w/file/fetch/144426072/hadoop_the_definitive_guide_github.pdfIn PDF document text
    • http://mepijewaj.pbworks.com/w/file/fetch/144426621/tinubajo.pdfIn PDF document text
    • http://tarogifere.pbworks.com/w/file/fetch/144586038/percy_jackson_a_batalha_do_labirinto_frases.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_off0000e051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE051 5152 bytes
SHA-256: b19272eb2cb4672e1d322aef2ae67e05f07a5f2b08cc2b0a6b3b8637775bbe67
font_01_sfnt_off0000f1d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D9 10960 bytes
SHA-256: 882394aa7ca86f70e0f1f062374ff708d72732bb1a04b1aa00cc5ae067f076bf

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