Malicious PDF — malware analysis report

Static analysis result for SHA-256 c930b74afa265e2e…

MALICIOUS

PDF

84.3 KB Created: 2021-03-07 19:58:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: eba8423ef77ff4ff74c4d0ec6f6e1346 SHA-1: 51fb223721a363dbcdd7543d192f4243705c2ecf SHA-256: c930b74afa265e2e8a0948eb9d0d78623a58ea408b7bb26508a14c4bb7e88758
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting it functions as a link farm for phishing or malware distribution. The embedded content, though heavily obfuscated, appears to be related to search terms like 'Baldur's gate 3 release 2021', indicating a lure to attract users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ponafet.ru/123?utm_term=baldur%2527s+gate+3+release+2021 PDF link annotation
    • https://cdn.sqhk.co/suwezuzifu/RXFtczb/basketball_game_score_now.pdfIn PDF document text
    • https://cdn.sqhk.co/pofaxexaxi/gdChaha/free_ringtone_iphone_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413118/normal_5fc5ab477b37c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379371/normal_5fc874af1b3d7.pdfIn PDF document text
    • http://jaxagogilexet.sportsontheweb.net/91841925482.pdfIn PDF document text
    • https://cdn.sqhk.co/rosisole/Wkngrhi/tennessee_titans_game_schedule_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/vixukose/aiaCAje/smash_club_arcade_brawler_apk.pdfIn PDF document text
    • https://giwemonuxir.weebly.com/uploads/1/3/0/7/130775654/jepadasesepikusotiw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372719/normal_603eb14c97dfe.pdfIn PDF document text
    • https://tewedarutomos.weebly.com/uploads/1/3/2/3/132302993/gudemirukaxiluse.pdfIn PDF document text
    • https://cdn.sqhk.co/rasidepad/hcuggja/rush_limbaugh_today_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/lexaxemiji/Nhi5Dhc/prison_simulator_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/rosojolude/fulhhgd/call_recorder_app_android.pdfIn PDF document text
    • https://jopazidavasuzu.weebly.com/uploads/1/3/2/6/132681438/7325182.pdfIn PDF document text
    • https://cdn.sqhk.co/moxulofilose/2gijgha/charm_city_kings_release_date_hbo_max.pdfIn PDF document text
    • http://balegetiwep.mywebcommunity.org/my_parrot_ck3100_has_stopped_working.pdfIn PDF document text
    • http://gowanenutik.mypressonline.com/how_to_reverse_traxxas_tq_steering.pdfIn PDF document text
    • https://cdn.sqhk.co/goronikel/LnY5gjw/52537334471.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464871/normal_5ffa24003d28a.pdfIn PDF document text
    • https://kefileke.weebly.com/uploads/1/3/5/3/135392356/d2930.pdfIn PDF document text
    • https://cdn.sqhk.co/jadepibake/PhcTnhf/tinazo.pdfIn PDF document text
    • https://cdn.sqhk.co/towinomer/8XcLGii/geometry_dash_subzero_full_version_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00010044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10044 2960 bytes
SHA-256: 4253ce374f546ed82c0b962bfad5e193173c5af7311640f7068ccdda2cb38311
font_01_sfnt_off00010ac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC5 5564 bytes
SHA-256: 0f9805d7aa22b20cfd3ed1fa46e12a677dfaaf4fba595d08b747dc9035d5f6ee
font_02_sfnt_off00011dcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DCB 11056 bytes
SHA-256: e00535db0826b44552046d8568abc66fc77d1dc9709997d1129759d7ea32d0d8