Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9d03d40b5d1fe5c…

MALICIOUS

PDF

81.4 KB Created: 2021-03-04 17:16:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d007886eccdce21a7e639b4762dbe588 SHA-1: 29b8f373514709e563ab570ffd74a31b7f7c4c51 SHA-256: e9d03d40b5d1fe5c1827d48c8b87d29d987f6ead724f5527ca3a30573245e902
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by 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 0.9990

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation 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://dugedepap.ru/strik?utm_term=how+to+change+tecumseh+carburetor PDF link annotation
    • https://cdn.sqhk.co/zivupowixede/Sheibey/amc_orange_30_anaheim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415946/normal_600adc3c7f66b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387712/normal_6016f330cc0ce.pdfIn PDF document text
    • https://latitatuforuza.weebly.com/uploads/1/3/1/3/131398212/wowofiki_nasezudob_matuloj_fuxidatorutexo.pdfIn PDF document text
    • https://rebopugosoge.weebly.com/uploads/1/3/5/3/135346619/wodovigiwolubusan.pdfIn PDF document text
    • https://duzopotubesafes.weebly.com/uploads/1/3/4/8/134890215/1767395.pdfIn PDF document text
    • http://fevinoreniwelik.sportsontheweb.net/how_to_draw_an_eye_procreate.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367914/normal_5ff578685611b.pdfIn PDF document text
    • https://buxexemap.weebly.com/uploads/1/3/4/8/134890763/motokubusali.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391009/normal_60244535d6a55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369659/normal_60361ccc98089.pdfIn PDF document text
    • https://cdn.sqhk.co/kafekata/heY8heP/best_free_music_videos_apps.pdfIn PDF document text
    • https://toroborelap.weebly.com/uploads/1/3/4/8/134867907/sifewuzedepemovivow.pdfIn PDF document text
    • https://cdn.sqhk.co/dugudumopup/jWgexw3/40343078954.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490116/normal_6026c32232f5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494435/normal_602372212e2c1.pdfIn PDF document text
    • https://kufepodesaf.weebly.com/uploads/1/3/4/3/134336702/tejadoxa.pdfIn PDF document text
    • https://cdn.sqhk.co/wusezofetib/dIjiGia/belib.pdfIn PDF document text
    • http://roxelejabojafe.scienceontheweb.net/how_to_boxing_at_home.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzuvazol/erjbAjb/finger_skateboard_tricks_videos.pdfIn PDF document text
    • https://movabeze.weebly.com/uploads/1/3/0/8/130814110/kokotapajerapires.pdfIn PDF document text
    • https://biwizodem.weebly.com/uploads/1/3/4/6/134650183/4003760.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sabiwilurase.atwebpages.com/beowulf_telugu_dubbed_movie_free_download.pdfIn PDF document text
    • http://gaxilitexu.onlinewebshop.net/how_do_you_program_genie_remote.pdfIn PDF document text
    • http://tebuwawezizafes.onlinewebshop.net/how_to_mix_aveda_color.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_off0001026f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1026F 5372 bytes
SHA-256: bdee3183f85a7f6fafb8f895c27c47d4520bb701e0ba9eb5197ea5b1b26910b4
font_01_sfnt_off0001149d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1149D 10232 bytes
SHA-256: 3c4e326ca86d26ac296b3a60160f8ef59758421cef2625376cd0417ad89152cc