Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dc11394fb6c3d79…

MALICIOUS

PDF

93.3 KB Created: 2021-03-22 05:56:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1eac25ab4b2ca0874bedbb0b2d9f0611 SHA-1: 41a39afbc1a5a96be53adbb6feab5ef63f10eb63 SHA-256: 8dc11394fb6c3d79bd83d16ed1295851c81c40f0de305729f94dcd09cefc07d7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://crophysi.ru/wix?keyword=march+madness+2020 PDF link annotation
    • https://cdn.sqhk.co/vadavenaw/fgjJhdC/download_game_barber_shop_simulator_3d_mod_apk.pdfIn PDF document text
    • http://limecash.xyz/definicion_de_exito_profesional_segun_autores1lyo9.pdfIn PDF document text
    • http://de-bewertung-id2842384.icu/cuento_para_siempre_camino_garcia0ebjx.pdfIn PDF document text
    • https://cdn.sqhk.co/xugufufifo/D4ifMii/scavenger_hunt_clues_and_answers_for_adults.pdfIn PDF document text
    • http://komamoj.22web.org/butterfly_s_tongue_manuel_rivas.pdfIn PDF document text
    • https://cdn.sqhk.co/batitiviz/ididjj2/jisumabolawumusepo.pdfIn PDF document text
    • http://fudidudigas.iblogger.org/26691391972.pdfIn PDF document text
    • https://wifojulov.weebly.com/uploads/1/3/1/4/131438113/039c1b9afe1.pdfIn PDF document text
    • https://jejomedilad.weebly.com/uploads/1/3/5/3/135316302/4930329.pdfIn PDF document text
    • https://cdn.sqhk.co/dibirolinu/wHifgzx/super_mario_run_world_4-_1_purple_coins.pdfIn PDF document text
    • http://urologo.store/matoremoj77z9.pdfIn PDF document text
    • http://cafechorsu.ru/download_film_rudy_habibie_full_movie_hdifejz.pdfIn PDF document text
    • http://excschool.ru/47849234196iorlt.pdfIn PDF document text
    • https://lurugidapu.weebly.com/uploads/1/3/4/3/134315770/zotikubudewem-lofuki-peguduzi-barasimajo.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://sopazizepo.rf.gd/chou_s_electrocardiography_in_clinical_practice.pdfIn PDF document text
    • http://webeputexewek.rf.gd/thompson_center_hawken_209_conversion_kit.pdfIn PDF document text
    • http://vugikalijuboxo.epizy.com/basojokure.pdfIn PDF document text
    • http://baredijela.rf.gd/international_phonetic_alphabet_pronunciation_guide.pdfIn PDF document text
    • http://vukotirigepiv.epizy.com/componentes_inorganicos_de_los_seres_vivos.pdfIn PDF document text
    • http://gijafusatuvaxoj.rf.gd/bazowakojomana.pdfIn PDF document text
    • http://ramivigemotaf.epizy.com/84862044974.pdfIn PDF document text
    • http://duxurulokij.epizy.com/15010968714.pdfIn PDF document text
    • http://kipirigup.rf.gd/2013_buick_verano_intellilink_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
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F09 4976 bytes
SHA-256: 1e358b0a65d0a5dc3c0fbfb3e937bace3226e37dc78d100fd61c2477a1b55ee1
font_01_sfnt_off00011fb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB3 10780 bytes
SHA-256: 1fc5a66d8492e30626775f0c7ad68f60c2608f3389e01d3809d47f6f79aef91d
font_02_sfnt_off000144e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144E6 16060 bytes
SHA-256: 5b0d2701ab39d2f69c66d7d16c60d8db0b323aa0832947137e757b5401d27330
font_03_sfnt_off0001597e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1597E 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378