Malicious PDF — malware analysis report

Static analysis result for SHA-256 5457bd5910827b0b…

MALICIOUS

PDF

75.2 KB Created: 2021-06-09 18:26:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 8880b6ddb0bb01c8537f463127bd53c6 SHA-1: d1827b8f936cc7346219120e576ab2bffa0724dd SHA-256: 5457bd5910827b0b7c8c4ebde9d3ab961cb101b287e5fa0a49c08cb686bdc297
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs, with one prominent URL pointing to a site offering a movie, likely a lure for phishing or malware. Heuristics indicate it's a link farm on disposable hosting, and ClamAV detected it as Pdf.Phishing.Trojan. The ML classifier also flagged it as malicious with high confidence. No scripts were extracted, but the structure and URLs suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ketchas.ru/pbw?utm_term=wrong+turn+7+full+movie+123movies PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4410694/normal_60b635c5230d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459777/normal_6036c59a0b364.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462732/normal_5ffbc8b8b6ea1.pdfIn PDF document text
    • https://nemaxalifaxibox.weebly.com/uploads/1/3/4/6/134627725/5895963.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386094/normal_5ffd3bd7ee8ed.pdfIn PDF document text
    • https://jasoveloxera.weebly.com/uploads/1/3/5/9/135967924/7f5831a0.pdfIn PDF document text
    • https://tavutapakewig.weebly.com/uploads/1/3/5/3/135399939/bidim_vewewebalara_vuxufe.pdfIn PDF document text
    • https://tofariviviri.weebly.com/uploads/1/3/4/1/134109347/78a5f80.pdfIn PDF document text
    • https://kokagajimixepu.weebly.com/uploads/1/3/5/3/135331661/1941926.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nodisakajew.pbworks.com/f/2006_chevy_uplander_repair_manual_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e24dccf-57e5-43f4-951e-f67b53340b3c/diablo_3_season_22_necromancer_build_bone_spear.pdfIn PDF document text
    • http://ruxafonan.pbworks.com/f/31031760652.pdfIn PDF document text
    • http://vosebim.pbworks.com/f/durotas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cb248b8-2fb1-4569-bb4f-07f4121e4d73/23361480922.pdfIn PDF document text
    • http://gaxoxim.pbworks.com/f/how_to_fill_us_customs_declaration_form.pdfIn PDF document text
    • http://jujirafamena.pbworks.com/f/what_do_the_russian_dolls_represent_in_lucifer.pdfIn PDF document text
    • http://wigiwopajuke.pbworks.com/f/latuzap.pdfIn PDF document text
    • http://motekus.pbworks.com/f/blacksmith_potion_recipe.pdfIn PDF document text
    • http://funinupun.pbworks.com/f/31231315294.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19f851ec-f4d7-47c1-9163-2a112340c2ab/tidolo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dee121f-0696-46d5-853c-1d5eaa630e52/why_wont_my_hp_photosmart_5520_printer_print_black.pdfIn PDF document text
    • http://pexovobef.pbworks.com/w/file/fetch/144778185/candy_crush_saga_mod_apk_for_windows_10.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_off0000e77a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77A 5376 bytes
SHA-256: 1215a4e3ad6dd6428b9cd621c6c7598da177f6806dae2c9f16b8a7e850edbd5e
font_01_sfnt_off0000f9d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D7 10512 bytes
SHA-256: f07c002ecfa952a1e33b691d8d1dabcbeec0f0b47831bd34f857c82d3c78b2ca

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