Malicious PDF — malware analysis report

Static analysis result for SHA-256 be4b2db8244e8096…

MALICIOUS

PDF

78.6 KB Created: 2021-03-10 09:44:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 49e3fcbd5e01a3ab79f37c292b3e3f6f SHA-1: 34d870713f7e227c452b0e7d821790898ad51647 SHA-256: be4b2db8244e80962a80bfc3e53caeb985fc396de933b67367a41303b8a3496b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://gimoguvi.ru/award?keyword=sample+letter+of+appeal+for+reconsideration+pdf PDF link annotation
    • http://byseles.xyz/what_is_myth_crash_course_world_mythology2n84l.pdfIn PDF document text
    • http://tadidavazutopa.sportsontheweb.net/adobe_acrobat_pro_reduce_size.pdfIn PDF document text
    • http://xufamorazogubov.sportsontheweb.net/2020_maserati_granturismo_mc_price.pdfIn PDF document text
    • http://hydrofthol.space/882000753825qndy.pdfIn PDF document text
    • http://lejebodaz.22web.org/formato_para_mantenimiento_preventivo_de_tableros_electricos.pdfIn PDF document text
    • http://femovanisom.iblogger.org/zafexega.pdfIn PDF document text
    • http://zabemaladameg.medianewsonline.com/how_to_create_a_training_manual_in_microsoft_word.pdfIn PDF document text
    • http://mnclassis.org/bihar_board_12th_model_paper_20200wawo.pdfIn PDF document text
    • http://contact-git.top/735203235509x620.pdfIn PDF document text
    • http://tiwomizodelujew.22web.org/jujajil.pdfIn PDF document text
    • http://elerctum.org/796427645200y8sa.pdfIn PDF document text
    • http://serururepus.scienceontheweb.net/what_is_the_boundary_layer_in_fluid_mechanics.pdfIn PDF document text
    • http://wumewil.sportsontheweb.net/is_marvel_zombies_canon.pdfIn PDF document text
    • http://tvoyoproc.fun/xifoketumezelalimuvwfff.pdfIn PDF document text
    • http://mangalvpodarok.ru/66822006514x732q.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/404507e4-604b-4ead-ac93-a7c7429ed23d/87063837881.pdfIn PDF document text
    • http://rogomore.myartsonline.com/nefilezafizubofepufotobo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a6fb24e-bea2-4485-ab57-47e5b98a9c91/how_long_do_beats_studio_3_wireless_last.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b6b816f-c49d-4d2c-bd45-4b1cd401ae77/cuisinart_brew_central_14-cup_programmable_coffeemaker_instructions.pdfIn PDF document text
    • http://xitesoduv.epizy.com/fitojijelukuwisa.pdfIn PDF document text
    • http://kawerulim.onlinewebshop.net/power_xl_air_fryer_cooking_times.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78979376-f18f-4c50-9e05-50a28dff5291/control_system_engineering_bs_manke_free_download.pdfIn PDF document text
    • http://rotufixijisadi.onlinewebshop.net/bafakurewobudutanaxanoto.pdfIn PDF document text
    • http://xukajipovaru.epizy.com/the_carnivorous_carnival_chapter_1_summary.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_off0000f779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF779 5404 bytes
SHA-256: b91ff5508912eea9b458308ab2d46461e9c67a7cffadfe3df6f96488a4020c3b
font_01_sfnt_off000109be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109BE 10224 bytes
SHA-256: 6c90988e05c27ab5040146c61cf13b2f3789702205c6ec0cf67b59f8cd68a553

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