Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e857feba71a545d…

MALICIOUS

PDF

76.4 KB Created: 2021-03-19 12:44:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 484cd9f40ec9e3e37984dcc3df91006d SHA-1: 2651ba25622b0939d397dab57260bce501af9069 SHA-256: 3e857feba71a545de68d9923cae8f21409408bd17574bfd5a143588c71384130
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though truncated and obfuscated, contains text related to 'Vanity fair film online subtitrat', suggesting a lure to a fake streaming service. The presence of external URIs, including one pointing to 'jacksth.ru', further supports a phishing or malware distribution attack pattern. No scripts were extracted, but the overall structure and heuristic firings point to a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jacksth.ru/strik?utm_term=vanity+fair+film+online+subtitrat PDF link annotation
    • http://bofoduweb.22web.org/kaplan_mcat_books_buy.pdfIn PDF document text
    • https://cdn.sqhk.co/vonewesipan/dVjcegj/duzogudimi.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/gcJid07/62781748975.pdfIn PDF document text
    • http://sesizuxewewax.mygamesonline.org/is_it_illegal_to_not_renew_a_lease.pdfIn PDF document text
    • http://gapilojazixo.getenjoyment.net/how_do_i_put_my_gateway_into_bridge_mode.pdfIn PDF document text
    • http://juzufezike.mygamesonline.org/vuxagurilor.pdfIn PDF document text
    • http://gekenig.mywebcommunity.org/38096063651.pdfIn PDF document text
    • https://cdn.sqhk.co/burajugi/iy1ycfi/sinhala_agriculture_books_free.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/7486e0f3-b710-4f72-80ab-17d7ad24d08f/gopibakebiguxijamujogiw.pdfIn PDF document text
    • http://jodewejuwuw.epizy.com/marvel_future_fight_beginner_s_guide_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95202724-e0a7-4a2a-a0ea-2fccf00ec231/how_to_use_keyboard_as_midi_controller_cakewalk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1af57287-f93b-4252-bd4c-bad732d03f27/weber_genesis_cast_iron_grates_which_side_up.pdfIn PDF document text
    • http://xojazexodiwosi.epizy.com/253_recettes_de_cuisine_algrienne.pdfIn PDF document text
    • http://lafatakijuton.epizy.com/simonesunoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e852e1e4-fc1a-46bf-8060-ccf34c8d7106/vireruwozekidemotabusokin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf466c8a-315a-42af-9019-def2c4d0ad17/the_secret_garden_book_controversy.pdfIn PDF document text
    • http://vevisadoko.epizy.com/reported_speech_with_2_verbs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c35f2b2-005a-4bb8-9abc-6157b4c73bf7/how_to_fix_the_pilot_light_on_a_hot_water_heater.pdfIn PDF document text
    • http://nabulegewuwal.myartsonline.com/apache_jmeter_user_manual_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ea84d84-c803-489e-98ba-a874c44f5fa4/26471652571.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df5c0b63-0402-4b37-8f6a-815078ab9fd7/how_to_write_a_frequency_distribution_table.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c10e1760-d1a3-4d71-8bfc-8273e6dbff55/black_hawk_down_full_movie_dual_audio_480p.pdfIn PDF document text
    • http://javozajesaretu.epizy.com/xepolipoteluduxebujos.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_off0000eb15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB15 5120 bytes
SHA-256: 24a5e76a56b8edca2b35026c0a0ef44ad35677cbde00b7b4af7614dfe1c41b99
font_01_sfnt_off0000fc78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC78 11892 bytes
SHA-256: 548ee6a70997cf856cc72495add316617abde5431590b746b255220778109cc8