Malicious PDF — malware analysis report

Static analysis result for SHA-256 abf800bbf332bc9e…

MALICIOUS

PDF

104.1 KB Created: 2021-03-17 17:27:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 70aa26c821ce5f4d94e44e50db686ac6 SHA-1: c72b2979131a0d1bafc6428f8b6e96919548f081 SHA-256: abf800bbf332bc9e5d1dda9e0c8a195efc28c8ae4f00c841e23e494fd6d311f8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. The document body, though heavily obfuscated, suggests a lure related to 'Pelicula completa en español', aiming to trick users into visiting the malicious URLs.

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://leonvi.ru/wix?keyword=pelicula+completa+en+espa%25C3%25B1ol+de+enchufetv PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4450043/normal_5ffb8f83f1595.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446272/normal_5fda561c2acf8.pdfIn PDF document text
    • http://ronerikasov.22web.org/drama_ppt_template_free_download_medical.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500425/normal_5ff255f230298.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393900/normal_6025900b7d984.pdfIn PDF document text
    • http://paxosij.mygamesonline.org/what_are_the_a_x_and_b_y_components_of_the_net_electrostatic_force_on_particle_3.pdfIn PDF document text
    • http://fakosujonipej.iblogger.org/annamalai_tamil_film.pdfIn PDF document text
    • http://lulopoboxefon.scienceontheweb.net/pokaseduxafubarapawa.pdfIn PDF document text
    • http://pufivuziviv.mypressonline.com/71733633477.pdfIn PDF document text
    • http://geloxexomub.iblogger.org/what_is_a_proust_questionnaire.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://damowepoko.myartsonline.com/sidozutopin.pdfIn PDF document text
    • http://ruguwozud.epizy.com/fajogimovoke.pdfIn PDF document text
    • http://mibesajaku.epizy.com/aaos_knee_strengthening_exercises.pdfIn PDF document text
    • http://nakarajibap.myartsonline.com/gakaxe.pdfIn PDF document text
    • http://vesedakowata.onlinewebshop.net/letak_ictus_cordis_normal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aae6349b-3b89-4abd-aa81-6236a33eb805/how_to_set_up_swann_security_camera.pdfIn PDF document text
    • http://mirijevedot.epizy.com/what_is_the_setting_in_the_story_of_hansel_and_gretel.pdfIn PDF document text
    • http://mugizov.epizy.com/what_immunizations_does_walmart_offer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed3ffc54-7f49-4c79-b6bf-a3fa5d3df190/35430941512.pdfIn PDF document text
    • http://rolexewosuvasu.epizy.com/d_d_beyond_character_sheet_free.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_off000159bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159BF 5572 bytes
SHA-256: 963b5519003996359202a4a701602b6542fd22709c04d639d3d0c84066230561
font_01_sfnt_off00016c54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C54 11368 bytes
SHA-256: 306232cf43b1eca8b91f9ef0852dec8a21bc6f4cd1c9eeb4337de6f9f46474e0

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