Malicious PDF — malware analysis report

Static analysis result for SHA-256 fab116e8c7c0731e…

MALICIOUS

PDF

62.7 KB Created: 2021-03-08 23:13:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c3be7e2ee09f4413f53ac763ea51f942 SHA-1: 5b8a1f63114d609a0028b8dd412395bac6a554b2 SHA-256: fab116e8c7c0731ef39b11d007553ebba0c1d312877240c055e7f17d6d4acb97
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are hosted on suspicious domains, indicating a link farm or SEO spamming technique. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards the use of embedded JavaScript for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8395

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://lozipotod.ru/award?keyword=annexes+icao+pdf PDF link annotation
    • http://kopumiwabetare.66ghz.com/dark_mode_gmail_app_android.pdfIn PDF document text
    • https://cdn.sqhk.co/tojebaru/hcZB1rg/airplane_pilot_cabin_flight_simulator_3d_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/sevafeluba/cOidNjd/kanto_pokedex_pokemon_go_145.pdfIn PDF document text
    • https://cdn.sqhk.co/minamojazi/Npgrrid/todo_list_react_redux_tutorial.pdfIn PDF document text
    • http://onkoprofi.ru/wenutadijetve8z.pdfIn PDF document text
    • http://damita.fun/namafozogoxixitekavaluwic6dl2.pdfIn PDF document text
    • https://ponegibafuzixi.weebly.com/uploads/1/3/1/4/131406662/3948199.pdfIn PDF document text
    • https://cdn.sqhk.co/jaziwuke/chi8gcI/best_lightsaber_fighter_in_star_wars.pdfIn PDF document text
    • http://byseles.xyz/algebra_and_trigonometry_10th_editionp63b0.pdfIn PDF document text
    • https://rejukikigukaw.weebly.com/uploads/1/3/5/3/135387704/laxirezimafu-doxelagetu.pdfIn PDF document text
    • https://cdn.sqhk.co/mukujoripu/hcTHgfN/virtual_races_for_charity_uk.pdfIn PDF document text
    • http://everydayy.fun/gupixivojosekewm4emj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/enthalpy_calculations_using_hess_s_law_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/boonton_township_crime_report.pdfIn PDF document text
    • http://newubopuga.epizy.com/freelance_website_design_contract_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/54008446020.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/89343029054.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/upcoming_bollywood_movie_2019_release_date_information.pdfIn PDF document text
    • http://leveroratex.rf.gd/suredifini.pdfIn PDF document text
    • http://putazosaw.epizy.com/zudupe.pdfIn PDF document text
    • http://xutevefe.epizy.com/one_punch_man_season_3_episode_1.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/google_sheets_query_different_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/android_app_development_company_in_delhi_ncr.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1DA 4788 bytes
SHA-256: 0f25f4e370993d6ecefdc05f1351af32c7acdf781eec70fadbfe26834b4da778

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