Malicious PDF — malware analysis report

Static analysis result for SHA-256 63dc5072d7beb456…

MALICIOUS

PDF

67.8 KB Created: 2021-03-25 20:06:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 13d1530bb9a4b8aa36111d5178462de7 SHA-1: 6c8f198c502b8ab49542bfeecd57ddd5864f2c05 SHA-256: 63dc5072d7beb456450b813563d7942352e42d5c089d1a3199222736be50c7cb
184 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to disposable domains and redirectors, indicating a link farm designed to obscure malicious destinations. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL leading to known malicious infrastructure. While no scripts were directly extracted, the PDF structure and link farm behavior strongly suggest an attempt to redirect users to a phishing or malware-hosting site, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/123?utm_term=singapore+airlines+arrival+information In PDF document text
    • http://boraguw.medianewsonline.com/bose_home_speaker_500_manual.pdfIn PDF document text
    • http://dulexip.22web.org/balancing_equations_worksheet_and_answer_key.pdfIn PDF document text
    • https://cdn.sqhk.co/wukomidekepu/jbJqzGK/lambo_polysphere_fast_cars_3d_puzzle_game.pdfIn PDF document text
    • https://cdn.sqhk.co/walamalesumi/7jihaii/globe_at_home_prepaid_wifi_app_apk.pdfIn PDF document text
    • http://zefakelilivaxo.iblogger.org/melefel.pdfIn PDF document text
    • https://toraboretopupu.weebly.com/uploads/1/3/4/7/134769369/79568af28918687.pdfIn PDF document text
    • http://jerimujolegem.medianewsonline.com/rig_veda_book_in_sanskrit.pdfIn PDF document text
    • https://cdn.sqhk.co/rarinuva/1jc5gha/nightfall_armor_surge_2.pdfIn PDF document text
    • https://zefinefan.weebly.com/uploads/1/3/2/8/132816158/gasakedabox-ruvus-mikug-ripanoxa.pdfIn PDF document text
    • http://mevesepegubisis.scienceontheweb.net/transdermal_drug_delivery_system_review_article.pdfIn PDF document text
    • http://datifuxevewa.22web.org/eddie_bauer_pack_n_play_quilted_sheet.pdfIn PDF document text
    • https://worudunomazife.weebly.com/uploads/1/3/1/4/131483266/motezozuwaj.pdfIn PDF document text
    • http://rivozuzeno.mywebcommunity.org/tabesogufabomixoragibag.pdfIn PDF document text
    • https://magapevalapa.weebly.com/uploads/1/3/0/8/130874167/e9f680fcda.pdfIn PDF document text
    • http://rexidoguvigibux.22web.org/attendance_record_sheet_monthly.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xavisijividefo.epizy.com/wopinaloxebewofil.pdfIn PDF document text
    • http://bofatiwatepelu.epizy.com/is_there_a_reset_button_on_a_carrier_furnace.pdfIn PDF document text
    • http://loxazugexola.epizy.com/how_to_use_a_wire_locator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d19411d-0547-4bbb-88b3-59285735da79/fenepobebet.pdfIn PDF document text
    • http://bitines.myartsonline.com/jujagejesedofe.pdfIn PDF document text
    • http://tudemofexurujen.epizy.com/visual_studio_2017_platform_toolset_v110.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81aa665f-aac6-4233-a3a1-16005001773f/does_costco_have_unlocked_phones.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_off0000cc13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC13 5384 bytes
SHA-256: f3c839754ea79e9c0a13fbe18ae623aa5a661e5bb0b78e6c877bf9b9da0c99a3
font_01_sfnt_off0000de57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE57 10456 bytes
SHA-256: 4c2ff1f4b2461f9256bbf33abc1213b356970552b0900d73ff700cc3988c1f74