Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e6fe0e653863d8f…

MALICIOUS

PDF

72.6 KB Created: 2021-03-14 09:32:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a6f3257d0ec6a27751674353eff1df19 SHA-1: 9d942d5e1d5543976e2bff7feebf94e63c91dec7 SHA-256: 7e6fe0e653863d8fbd5f297d95e661926a7b268c5cc33ab094e475c063fa1f23
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 0.9960

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://baarspo.ru/wix?keyword=manual+de+seguridad+e+higiene+industrial+pdf PDF link annotation
    • http://donbetosstreettacos.com/mtg_deck_building_guide_for_beginnersr6ffs.pdfIn PDF document text
    • http://nesobaka3.xyz/python_basics_for_data_science_githubierop.pdfIn PDF document text
    • http://flylovel.com/apple_ipod_shuffle_4th_generation_-_2_gb_-_blueymjpz.pdfIn PDF document text
    • http://tobufupevujuma.mygamesonline.org/how_do_i_connect_my_hp_photosmart_d110_to_wireless_network.pdfIn PDF document text
    • http://pristav.pro/wivelatolts477.pdfIn PDF document text
    • http://italywow.pro/who_is_the_strongest_god_in_dragon_ball_zjl0wn.pdfIn PDF document text
    • https://cdn.sqhk.co/dopuwene/dmf8Qih/alien_invasion_movies_1990s.pdfIn PDF document text
    • http://jigikujed.scienceontheweb.net/3_day_full_body_workout_routine_for_beginners.pdfIn PDF document text
    • http://cosmosqrab.online/ample_guitar_m_lite_ii_manualzqqkt.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwutiro/cL14ibA/free_gems_dragon_city_no_human_verification.pdfIn PDF document text
    • https://cdn.sqhk.co/tobamozusaj/eyxH5DP/pezipivexub.pdfIn PDF document text
    • http://fastgetme.online/mixonovojizibuwuzinapelij46e2i.pdfIn PDF document text
    • http://geleostone.online/ntuser.dat_corrupt_windows_7sd9by.pdfIn PDF document text
    • http://xuroriwonufuz.scienceontheweb.net/vagiz.pdfIn PDF document text
    • https://cdn.sqhk.co/xopuxuvop/hJL3Y5k/43380739616.pdfIn PDF document text
    • http://accueilcmb.com/79509834301dd1ur.pdfIn PDF document text
    • http://axecheat7.xyz/one_touch_ultra_mini_instructionse6axz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/155a9fa9-111c-470c-96a2-87706a80878a/17608393353.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/022a295f-c618-4ae5-9738-796879a6135e/95918265992.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f34578ad-5845-4d28-bdef-8e13029567cb/best_act_practice_book_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47919ae0-1593-4b68-b69c-a76c2429b201/how_to_transfer_line_art_to_digital.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb377ae6-b16f-4500-bd86-27289fe59d93/libro_de_historia_5_grado_2019_paco_el_chato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04d52e95-3797-40a2-b6b8-66f322f8d2e1/zazomoredaru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a1f847f-31a1-4722-aeae-cafb6a317cac/king_kutter_finish_mower_blade_removal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a32e8a6-b58a-475d-94e9-e63180e9aee3/zaxademobitesebalebu.pdfIn PDF document text
    • http://misanedajog.myartsonline.com/jovizeledane.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB91 5308 bytes
SHA-256: b61c830c7c3af5528e8334d62836256b7be9f6f4eb5dbe1a4f4c9ea1bb189cdf
font_01_sfnt_off0000eda8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA8 11412 bytes
SHA-256: e9eca347a9897dda8580fc3c142ed5d938472b59bb88a7430717d234306561ca