Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8c18d7eeee4a927…

MALICIOUS

PDF

146.4 KB Created: 2021-06-09 01:36:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: eaf64154ab20b35034caccd19e0ae85e SHA-1: 02bbc997712ee69006971b97c3de2d464c98db89 SHA-256: f8c18d7eeee4a927f449acaf9a572e4c1e5c43688d785e1eb90f56fc18cc86ce
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high-confidence ML classifier and ClamAV detection indicating malicious intent. One prominent URL, 'https://crysiq.ru/pbw?utm_term=chokher+bali+movie+online', suggests a lure related to movie downloads, a common phishing tactic. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the malicious nature by identifying a link farm on disposable hosting, likely used to obscure the true destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9704

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://crysiq.ru/pbw?utm_term=chokher+bali+movie+online PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4492575/normal_5ff8d9068273f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495271/normal_60467048566ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454164/normal_5fe984c07739c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452624/normal_60074432918b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464068/normal_5fdb7cd7ae59d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488560/normal_6054056350e7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448744/normal_5fdac396bbcf5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388050/normal_60672ce279016.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404290/normal_600cc2ddd2529.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kufujibumufa.pbworks.com/w/file/fetch/144588375/malayalam_full_movie_free_download_cinemavilla.pdfIn PDF document text
    • http://naxenuve.pbworks.com/w/file/fetch/144810384/convertire_in_word_online_gratis.pdfIn PDF document text
    • http://favakiwosut.pbworks.com/f/free_fire_mod_apk_unlimited_diamonds_download_for_mobile_download.pdfIn PDF document text
    • http://kevuxezedila.pbworks.com/f/how_to_unblock_caller_on_panasonic_home_phone.pdfIn PDF document text
    • http://vawijoj.pbworks.com/f/candy_crush_jelly_saga_mod_apk_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd52d044-6bf0-4b4b-b1e7-4e63808c4e85/1527507292.pdfIn PDF document text
    • http://wikitaxif.pbworks.com/w/file/fetch/144849753/natural_english_reading_and_writing_skills.pdfIn PDF document text
    • http://tanoroxamo.pbworks.com/f/animated_logo_after_effects_template_free.pdfIn PDF document text
    • http://sowenux.pbworks.com/w/file/fetch/144673749/begegamurumifunak.pdfIn PDF document text
    • http://mapijakemifo.pbworks.com/f/jumufobevevuxub.pdfIn PDF document text
    • http://siruzosu.pbworks.com/f/how_to_write_in_expanded_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/445f0bb6-29d9-413b-9238-11658d6c8ebb/lajenumazofufilaneme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5d45996-04be-4f61-bac1-825f7116f84e/64582660019.pdfIn PDF document text
    • http://jotuwufo.pbworks.com/w/file/fetch/144876678/55054352383.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93bb2deb-04cd-419f-bfb7-b5b09abbb50c/genisidijefibule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e20dd40-f355-4e13-b7ba-14920b89a1d9/wrong_turn_2_full_movie_in_hindi_download_480p_openload.pdfIn PDF document text
    • http://sorawako.pbworks.com/w/file/fetch/144470724/chevrolet_spark_2005_service_manual.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000180e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x180E0 6744 bytes
SHA-256: 0eac1552a6a0cc8d6d43e14f5c157d052ff2bf21460314f67a2c213e0a454e63
font_01_sfnt_off00019197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19197 17404 bytes
SHA-256: 97efc8c1562b8058251d35dccb96443029c5772fdc7e339a6da24d4b5895cb65
font_02_sfnt_off0001c8ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C8EF 4916 bytes
SHA-256: e96fd04a51bad5b264f04def0860afdfc6c992ba137e020460f323f00f864ed2
font_03_sfnt_off0001d979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D979 4764 bytes
SHA-256: 9828a563f761f8994f413cf4e7d6129fe09b21dabebf804f7090a47bf021029c
font_04_sfnt_off0001e873.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E873 15432 bytes
SHA-256: 52c0bbdf18e5fc4627ae68fbae1de7bef76c4f5ac4efc2c3e460bafc6adbed64
font_05_sfnt_off00021a89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21A89 19084 bytes
SHA-256: b623f86a2420c43f79a41ca3b0664c6bbe918903bf6b3ce1e4a8f340c6c48f61