Malicious PDF — malware analysis report

Static analysis result for SHA-256 e723782407c39f38…

MALICIOUS

PDF

75.1 KB Created: 2021-04-01 17:40:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 81377f1a9a241f191d14d1cd09df0b76 SHA-1: 74a59f12324cd118faf5727024c0d4190bbcd314 SHA-256: e723782407c39f38b7746caf7e6c6fe4764603a163d56fdcd36856f4b48b6a1e
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://jottigo.ru/award?keyword=willingness+to+pay+pdf PDF link annotation
    • https://cdn.sqhk.co/nerenina/bhdjgwv/escape_room_zombie_nyc.pdfIn PDF document text
    • http://usesalle.xyz/is_9000_dollars_a_lot_of_money4pugz.pdfIn PDF document text
    • https://vabeliguteziji.weebly.com/uploads/1/3/1/3/131379360/07412d558f9f.pdfIn PDF document text
    • http://creamwalls.space/how_to_look_up_old_gun_serial_numbersryzul.pdfIn PDF document text
    • http://sowakowakemim.mygamesonline.org/computer_algorithms_introduction_to_design_and_analysis_sara_baase.pdfIn PDF document text
    • http://vykupavto54.ru/devonthink_convert_to_searchablewpepl.pdfIn PDF document text
    • http://livethailand.fun/heroes_of_land_air_and_sea_solowcx12.pdfIn PDF document text
    • https://lejumapufa.weebly.com/uploads/1/3/4/6/134688193/9523879.pdfIn PDF document text
    • https://cdn.sqhk.co/rigizisojix/Mgiierl/usborne_my_first_word_book_about_food.pdfIn PDF document text
    • https://fudegedetet.weebly.com/uploads/1/3/4/7/134733785/gofejoxujozufe_mujaxozunidu_zuvegepamiget_pubuvonavibize.pdfIn PDF document text
    • https://zanubago.weebly.com/uploads/1/3/4/8/134886268/50819.pdfIn PDF document text
    • https://negapisege.weebly.com/uploads/1/3/4/6/134635707/1599680.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zorijefugixor.atwebpages.com/domain_name_server.pdfIn PDF document text
    • http://xunudijumo.myartsonline.com/blaue_reiter_almanac.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/outlook_app_dark_mode_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/manualidades_navideas_reciclaje_con_botellas.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/98057367856.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD993 5016 bytes
SHA-256: 28e702f141ab8f3c2481364b740f01f9f47e2a27179dee8fff194b6511175f40
font_01_sfnt_off0000eaca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACA 10832 bytes
SHA-256: 210c5eb34ae88b26b0ca026bdd426d9e158ff440da986e15f6e9262fd527d9df
font_02_sfnt_off00010fb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB5 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

Open this report in the interactive analyzer, or submit your own file for analysis.