Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a2c4bab9c711907…

MALICIOUS

PDF

76.0 KB Created: 2021-03-10 15:45:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 7773e3750f53e6ab13c3cb8fe32896c5 SHA-1: 5762bf8911dd7d1f42143ba70665540b492d539b SHA-256: 5a2c4bab9c711907de24287a6baa59b3a47244c03f8701c6fee367d783050569
126 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs, with one pointing to 'botokaw.ru', suggesting a phishing or redirection attempt. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further indicates a link farm designed for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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 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://botokaw.ru/123?utm_term=conventional+conforming+loan+guidelines PDF link annotation
    • http://gogotmif.space/download_game_dead_venture_zombie_survival_mod_apkdtywf.pdfIn PDF document text
    • http://hq-cleartv.info/composite_materials_merit_badge_book02d0n.pdfIn PDF document text
    • http://dalkomis.website/how_to_play_scratch_jr_appaxkyt.pdfIn PDF document text
    • http://retesopi.iblogger.org/36712982721.pdfIn PDF document text
    • http://lifeit.pro/988377601451buje.pdfIn PDF document text
    • http://davilebut.66ghz.com/22853742396.pdfIn PDF document text
    • http://arendaavto.taxi/where_are_primo_water_dispensers_madebgxiw.pdfIn PDF document text
    • http://neuroncraft.online/frigidaire_12000_btu_air_conditioner_bjsv875s.pdfIn PDF document text
    • http://jiwabozaxexe.mypressonline.com/tifirulozadogogisil.pdfIn PDF document text
    • http://komozazene.getenjoyment.net/1821026821.pdfIn PDF document text
    • http://ilook.market/how_to_obtain_original_birth_certificate_after_adoption_in_californiar7yho.pdfIn PDF document text
    • http://tuvivukaroj.mygamesonline.org/hp_officejet_5510_all_in_one.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://959e49da-b405-4961-97d4-5c1bb2e9a628.filesusr.com/ugd/ab0441_923bf7a89c05423cae7bae20e5218448.pdf?index=trueIn PDF document text
    • https://b5c90759-dbf8-4ccd-b12d-e23c958527f9.filesusr.com/ugd/915a55_a7c2a9925a68423aa6b61f6589f3c78f.pdf?index=trueIn PDF document text
    • https://6b137298-3864-41c5-aaa3-11744000c3c2.filesusr.com/ugd/b916f4_ae8eda9f170549abbfe4bc98e30c25f3.pdf?index=trueIn PDF document text
    • https://2ffa788b-df2f-461f-b9c5-573bec542745.filesusr.com/ugd/374ce0_6a43d8d063484918a178a9a0ce5c215f.pdf?index=trueIn PDF document text
    • http://kedokonox.rf.gd/guideposts_trust_address.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/494f1d0b-5cc9-4852-a188-2c03e0187f20/mr_coffee_burr_grinder_how_to_clean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e157a835-e64d-4edb-bfdc-e02bfab9a2e0/la_gallina_degollada_libro_completo.pdfIn PDF document text
    • http://damikofem.rf.gd/win_7_format_sd_card.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2178027-0e5a-42fc-a17a-7c98d4ba81a3/philips_system_one_cpap_machine_manual.pdfIn PDF document text
    • https://8d94caac-80d5-4f6d-a73a-04ed47837dc1.filesusr.com/ugd/585b1d_8ae77260d4df4ef185733fb35b5af161.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b6a0668-3284-46ba-b9dd-6a5daa01ce53/how_to_factory_reset_from_command_prompt_windows_10.pdfIn PDF document text
    • http://gudugapapilile.atwebpages.com/how_to_clean_cuisinart_dcc-1100.pdfIn PDF document text
    • http://gorexoriwow.rf.gd/monofaposevegewoladelena.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_off0000eb9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9C 5304 bytes
SHA-256: fc8672d8bb792a821ed16107f24a40bf4339e05a3cd9d1165a2736ca185143f1
font_01_sfnt_off0000fd96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD96 10772 bytes
SHA-256: bbbb29e6b920b5efa20d23543b53ac9faeb011055a375f9856752c1ce915e887