Malicious PDF — malware analysis report

Static analysis result for SHA-256 5042ba3520497a7e…

MALICIOUS

PDF

75.7 KB Created: 2021-03-16 11:11:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 345ccf2fb986f0b3894fc236b5efaea4 SHA-1: b435e5e90e1a58f4bf10829b35bb1291293ecfa4 SHA-256: 5042ba3520497a7e853e5fd0d6a0ce5a85418b750f3d403e083eb1a5799317da
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains or link farms, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, contains keywords related to 'Bollywood hd movies free mkv', indicating a lure to attract users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://fokemale.ru/123?utm_term=bollywood+hd+movies+free++mkv PDF link annotation
    • https://cdn.sqhk.co/mukibusu/hpCXyid/best_deals_on_iphone_12_pro_max_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/daxerarugak/rgjghTd/vrchat_anime_avatars.pdfIn PDF document text
    • https://cdn.sqhk.co/zururodi/hdxzPwn/suxugafopubevusok.pdfIn PDF document text
    • https://cdn.sqhk.co/zumumolebajo/6gifyB7/18702880388.pdfIn PDF document text
    • https://cdn.sqhk.co/nagebagem/aidhhhf/27785718158.pdfIn PDF document text
    • https://cdn.sqhk.co/mugodetutag/hgiQbgj/malipura.pdfIn PDF document text
    • http://bibivire.mygamesonline.org/excel_vba_msgbox_ok_cancel.pdfIn PDF document text
    • http://kufafukedexepix.mygamesonline.org/rekewukugerogi.pdfIn PDF document text
    • https://cdn.sqhk.co/kogujipubap/igqlege/red_alert_2_cheat_engine_money.pdfIn PDF document text
    • http://new-leggins.site/wosunejimas5.pdfIn PDF document text
    • http://reduslim-shopofficial.site/singularity_2017_movie_parents_guidek4ufz.pdfIn PDF document text
    • http://bukawavado.medianewsonline.com/certificate_of_origin_taiwan.pdfIn PDF document text
    • http://gamedv.design/nfl_cheerleader_porn20p0y.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wugerubuvugox.myartsonline.com/how_do_you_unlock_the_door_on_a_maytag_2000_series_washer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e03eef77-ebba-458d-8a0a-2179ed217d2e/a_cuanto_equivale_10_pulgadas_en_cm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ce8aa6c-062d-4f6b-9d31-98c1a9bd963c/zuxidofifadezodamu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1261c6a-ce92-4540-9b94-19cec3151f2e/opentx_companion_2.2.2_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfcbca2a-5211-44e5-9a66-c921430b782e/89883492649.pdfIn PDF document text
    • http://sabiwilurase.atwebpages.com/beowulf_telugu_dubbed_movie_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14a38dfe-8638-418f-a5e7-6ab1c44a0b9d/how_long_does_it_take_to_be_a_general_dentist.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d10490b4-6823-44e4-953c-2095f3dde123/irobot_braava_jet_m6_singapore_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20126dd0-6762-4fc2-b691-27bfdf929e76/how_to_study_medical_textbooks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09e07300-7c84-4b6a-bc60-e34a0675b87b/tm_meditation_technique_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adb6e10a-5389-47a9-9fa7-6d09f472eda5/how_much_is_1095_steel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3188b8f-2863-4c98-97bd-de17e2cd85e8/what_is_a_practice_theory_in_nursing.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_off0000e9cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CB 5304 bytes
SHA-256: 557147861df6b3696ad979d6ee403882e9d823401156c40c65bbce4f9f0276dc
font_01_sfnt_off0000fbcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCD 10860 bytes
SHA-256: 36d2a4aefef65aa94f99a76e542c6900a76cf56a5028dd7e0ae2a4b81026940e