Malicious PDF — malware analysis report

Static analysis result for SHA-256 d045f0a8780f85f0…

MALICIOUS

PDF

79.2 KB Created: 2021-03-08 13:45:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0e424ad87fba12f141821f164027a700 SHA-1: 2b3253b2711e5f822ae1092b79d983206543a911 SHA-256: d045f0a8780f85f0851e311b91d35330a2afc54aa3901478ffaab60c135211ff
126 Risk Score

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 0.9998

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://mezovuduw.ru/strik?utm_term=fluval+305+filter+set+up PDF link annotation
    • http://repair-planshetov.ru/dress_down_day_at_work_guidelinesato7l.pdfIn PDF document text
    • http://speak4pro.com/hoard_of_the_dragon_queen_5edn7ze.pdfIn PDF document text
    • http://gesetaxoxu.sportsontheweb.net/how_much_do_foster_parents_get_paid_in_va.pdfIn PDF document text
    • http://towonededuv.medianewsonline.com/satufe.pdfIn PDF document text
    • http://zugemenelil.medianewsonline.com/canon_powershot_a560_lens_error_restart_camera.pdfIn PDF document text
    • http://kopalirigel.mypressonline.com/how_to_use_a_thermador_oven.pdfIn PDF document text
    • https://cdn.sqhk.co/zaperarori/05qKrJD/jegosawadojagevusexol.pdfIn PDF document text
    • http://merishwheelrecords.com/felogus75q8g.pdfIn PDF document text
    • https://cdn.sqhk.co/takejirasomu/dXw2jjE/bingo_live_stream_download.pdfIn PDF document text
    • http://graatorama.fun/19061466660pe001.pdfIn PDF document text
    • http://stroymarketmetal.ru/banduk_ki_goli_dj_song1bunf.pdfIn PDF document text
    • http://domensita.fun/pokemon_sun_and_moon_starters_litten_final_evolutionmtx6c.pdfIn PDF document text
    • http://levantemosaic.com/bijupfthw9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://34e51215-b586-4e01-b3ea-a219475a7b91.filesusr.com/ugd/46481b_0ad582925d8e4098aa5ca5978ecc377b.pdf?index=trueIn PDF document text
    • https://b5d51143-f34a-4a4f-9265-6917490cb775.filesusr.com/ugd/9f69bd_5c2fd39a5a3d48a6b91f7358c2dda512.pdf?index=trueIn PDF document text
    • http://sasukagisodubex.onlinewebshop.net/hollywood_the_dream_factory_an_anthropologist_looks_at_the_movie-makers.pdfIn PDF document text
    • https://a5a8f6e1-24ae-425c-880d-6f4079e3c376.filesusr.com/ugd/035627_2f292af99f1a4cd6ba817ebe685e9b92.pdf?index=trueIn PDF document text
    • https://eb72eaa1-ef55-40a3-a653-f6d21bccf295.filesusr.com/ugd/54913d_c83fe22995504ed5b23bc2c876828138.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBD 2900 bytes
SHA-256: 10a07fc969e6c8cf41398fcfefa625e426b29a45b33f3716d0886db1405c0d2a
font_01_sfnt_off0000f800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF800 5340 bytes
SHA-256: 280f1c363bcaf40fdf9981c4a6765bd39e47c520762dd5dbb9670b7938c6cdd6
font_02_sfnt_off00010a43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A43 10884 bytes
SHA-256: f2b7a4bf1f93bc1eb28d864f4e47146531329e7977e9e8d0f9537cedb9e1f577

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