Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdf12cc1af80311e…

MALICIOUS

PDF

103.8 KB Created: 2021-03-04 03:59:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e2ca17e449c51bff1bb0775865e8f554 SHA-1: e768bdeaeff3d9949becddb50252fc916ed6b419 SHA-256: bdf12cc1af80311e1f444b688d746b3617695e236e82350c2bfaf1e9d1913380
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm designed to obscure the ultimate destination. The heuristic 'ML_NYX_PDF_MALICIOUS' and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs and the document's structure suggest it's designed to trick users into clicking through to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://dugedepap.ru/strik?utm_term=wd+my+cloud+software+download+windows+7 PDF link annotation
    • http://wojisub.mypressonline.com/how_i_learned_to_drive_script.pdfIn PDF document text
    • http://rasidafepu.mypressonline.com/sajejosixogo.pdfIn PDF document text
    • http://forexgeeks.net/which_of_the_three_colony_regions_had_a_warmer_climatebuxix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449779/normal_60164fa41027d.pdfIn PDF document text
    • https://cdn.sqhk.co/reriwoduriju/jbjeiaT/splash_potion_of_weakness_id_bedrock.pdfIn PDF document text
    • https://cdn.sqhk.co/sevijeruba/cGifiih/vuxaxabufazuwiwuzosigupog.pdfIn PDF document text
    • http://porizaritofo.mypressonline.com/is_honda_jazz_a_reliable_car.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366406/normal_5fca7ad683f60.pdfIn PDF document text
    • http://all-host.site/addition_et_soustraction_des_nombres_dcimaux_cm1rpbvs.pdfIn PDF document text
    • http://classkaod.ru/bleacher_report_colts_vs_chiefsyk8r9.pdfIn PDF document text
    • https://vabeliguteziji.weebly.com/uploads/1/3/1/3/131379360/zufewofinuzopef_gixasa_kolepe.pdfIn PDF document text
    • http://gukiduwonaxinef.getenjoyment.net/42828416020.pdfIn PDF document text
    • https://kanumipiga.weebly.com/uploads/1/3/5/3/135346224/9260360.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374857/normal_5ff404033a9a8.pdfIn PDF document text
    • http://questotzvezd.space/geo_realm_a_real_world_mmorpgiug2c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zagofij.onlinewebshop.net/alexa_commands_in_spanish_list.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_008_off00017f6f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x17F6F 6504 bytes
SHA-256: 24360cdb7014ada8aa5e6f1d3277a2d71ef7b6d1dc3bf288ea9a040c472e669a
font_00_sfnt_off0000f2ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EF 7516 bytes
SHA-256: 075fb9e944568478c94e38805233b1125798969703103af32602e568e806d8e3
font_01_sfnt_off00010675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10675 3148 bytes
SHA-256: a277baa0363301820e691350cb860598f83a55ab5f470b69e31f1ace31f899c5
font_02_sfnt_off000111b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B4 5452 bytes
SHA-256: ac848f903136454c9a95956485748290cfd03448dcfea694d09d784115d18be6
font_03_sfnt_off00012413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12413 6280 bytes
SHA-256: 9b26e63dddb061148d2096f8a3abd9ddbfbe7663dcfe2e6edc24d1b84c1ba01d
font_04_sfnt_off0001337d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1337D 18084 bytes
SHA-256: cbe9a03d9bde01d618775b2f1677cbedd5aca729af4c60c041fef92dde4e3604
font_05_sfnt_off000168d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168D1 16516 bytes
SHA-256: 04fe25b29f051d70f1708f46f478918d30a58f8dd56488b8fb7dbeafae74b6e1