Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cad9e8a1d2a4343…

MALICIOUS

PDF

77.6 KB Created: 2021-04-17 09:36:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 46134514adb1209dce298e6c053595f1 SHA-1: 74460467db3e4c037a27e89e1b04fbf2903400a0 SHA-256: 2cad9e8a1d2a4343c01077ddb660248e79a321a4493ca46bf1b90a462eb67f8d
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 0.9998

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=singer+fashion+mate+3342+bobbin+cover+plate PDF link annotation
    • http://hiziryigit.online/cuantos_ladrillos_en_un_metro_cuadradox6ipr.pdfIn PDF document text
    • http://plsale.pro/how_to_turn_off_a_nintendo_switch_pro_controllera68oa.pdfIn PDF document text
    • http://mignonette.space/manomoqgrn.pdfIn PDF document text
    • http://opensalle.xyz/what_is_the_theme_of_three_skeleton_keyzdewg.pdfIn PDF document text
    • https://cdn.sqhk.co/jemajujo/Lggc6ih/73487641594.pdfIn PDF document text
    • https://cdn.sqhk.co/kinuneba/ThdwYjf/gameboy_games_for_sale_ebay.pdfIn PDF document text
    • http://santaparker.store/22209578734hdctv.pdfIn PDF document text
    • https://cdn.sqhk.co/fasotaluvose/GW4jhhd/alarm_clock_app_for_pc_free_download.pdfIn PDF document text
    • http://resipowepo.getenjoyment.net/mappa_metro_bucarest.pdfIn PDF document text
    • http://rewetuxavix.mypressonline.com/how_to_connect_brother_printer_hl-1110.pdfIn PDF document text
    • http://zdorovie-vashe-vse.xyz/91099375892hz2aa.pdfIn PDF document text
    • http://bu-markett.com/stihl_ms180c_mini_boss_parts4p3mk.pdfIn PDF document text
    • http://net-klientov.ru/hard_reset_my_lg_phone_cricket18b7t.pdfIn PDF document text
    • http://5coupon.info/thiwanka_dilshan_new_song_audio80v25.pdfIn PDF document text
    • https://cdn.sqhk.co/pemoxeriko/dzhgjib/spacex_launch_today_live_youtube.pdfIn PDF document text
    • http://sis-paypal.com/varukeg6x107.pdfIn PDF document text
    • http://healthyforczechrepublic.site/oxford_new_headway_beginner4qeia.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wugujub.onlinewebshop.net/petewogupugigoniw.pdfIn PDF document text
    • http://pizenusogusu.atwebpages.com/55250159353.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA3F 5524 bytes
SHA-256: 1140c71295288d76813ff94899f61b8d959ef9c2a770f01c81592fe0163efe14
font_01_sfnt_off0000ed0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0B 6116 bytes
SHA-256: 8c19873f804e8517b812d50c75a5c047596a73f71c591bef8fb4a089311fbdec
font_02_sfnt_off000101c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C7 11716 bytes
SHA-256: 33115e126d3620f185b31d437e990023b4d0cca7a64b278c9d11285a75bdffa7