Malicious PDF — malware analysis report

Static analysis result for SHA-256 648f7a6f717c7cb9…

MALICIOUS

PDF

75.3 KB Created: 2021-03-23 12:45:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 0f17ca1bef5556b7b4cff261709a28e1 SHA-1: b551fb906cc13b517082d9f28776661b806c661c SHA-256: 648f7a6f717c7cb931ca414593fa22cdc2b1527b2fdbf744ffe2244747364f5b
136 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a high-severity 'PDF_SEO_UTM_REDIRECTOR_LINK' and a critical ClamAV detection, indicating it is a phishing lure. The embedded URL points to a domain designed to trick users into downloading a malicious payload, likely related to the document's deceptive title. No scripts were extracted, but the overall structure and URL suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://seumenha.ru/award?keyword=exception+handling+in+java+with+examples+program+pdf PDF link annotation
    • http://reactivaperu-2020.com/chrome_os_desktoptbiqm.pdfIn PDF document text
    • http://braco.ru/fesikonovotarikugokiponequ676.pdfIn PDF document text
    • https://cdn.sqhk.co/lekusovu/chjcz31/royal_enfield_classic_500_brochure.pdfIn PDF document text
    • https://cdn.sqhk.co/bitomasijelo/61BVJDS/excursiones_cruceros_mediterraneo_por_libre.pdfIn PDF document text
    • https://cdn.sqhk.co/zosikoto/ofyGUvi/update_android_8_galaxy_s7.pdfIn PDF document text
    • http://wacc-cat.org/what_is_fixed_variable_and_mixed_costs05rf0.pdfIn PDF document text
    • https://cdn.sqhk.co/satijumok/zHhashd/wwe_network_cancel_button_not_working.pdfIn PDF document text
    • http://topsalon.xyz/jolly_phonics_sound_and_action_sheetshpz5d.pdfIn PDF document text
    • http://instapriz24.online/starship_troopers_the_roleplaying_game7jub2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lojosikol.epizy.com/admissions_scert_odisha_deled_admit_card.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d9c9c4b-595e-41b7-a300-606a48598ce5/world_war_z_gameplay_no_commentary.pdfIn PDF document text
    • http://xavitubipuru.rf.gd/xbox_360_controller_driver_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/wirazalugeravukonepanifok.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/zojokalesisopuriwumufo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f285a1d-8c5b-416f-8d8c-e2666fecef2a/jerazusovorukunagisej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6aad23c-22d8-4efc-a9b2-713d9ac1b1e6/what_size_tires_go_on_a_honda_odyssey.pdfIn PDF document text
    • http://wojosuxe.epizy.com/cabelas_carnivore_meat_grinder_reviews.pdfIn PDF document text
    • http://gakinodimojulat.rf.gd/applied_statistics_analysis_of_variance_and_regression.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cc3a53b-736b-4be1-a7ca-5407571217e3/92386876975.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/61785250848.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03660a91-0f64-4450-b421-1ceae7c67428/defap.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/merch_by_amazon_additional_information_example.pdfIn PDF document text
    • http://nesozupedoxexig.epizy.com/baja_autoestima_definicion.pdfIn PDF document text
    • http://zelofamaguxedep.epizy.com/41167433660.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/24699591320.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_off0000e3f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F4 5820 bytes
SHA-256: 82b5ab0f42e6eadaed84c95cb8ff1b4e572c0be2bd9a463ec3eab95c6544639b
font_01_sfnt_off0000f7c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C0 11584 bytes
SHA-256: 1f40dc4eec6310a2cf87b82e48318dd3b0e2d351a2568c1dac55f613d1eae08c