Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b802834e836bcb5…

MALICIOUS

PDF

82.1 KB Created: 2021-04-15 09:06:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 72ab414e2d5e231341efbf23efe6bc12 SHA-1: c4ec221b4d2dfde52bc48586891c5884ff631db8 SHA-256: 8b802834e836bcb50e0de3d8dd96588eb828d2decf4f66a912d8b36419b90dbc
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9991

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://maypoin.ru/strik?utm_term=christmas+carols+songs+christian PDF link annotation
    • http://sodaapp.pro/76242844273mj9s.pdfIn PDF document text
    • http://tulinejifuwo.22web.org/the_haunting_of_hill_house_play_script.pdfIn PDF document text
    • http://alifan.store/tiktok_starbucks_drink_white_mocha_caramel8ecf0.pdfIn PDF document text
    • http://feyakast.online/rololatixanflsfi.pdfIn PDF document text
    • http://carbackseat.site/tropismo_y_taxismolli3q.pdfIn PDF document text
    • http://mpvideo.org/informal_methods_used_to_amend_the_constitutionhi653.pdfIn PDF document text
    • http://nazhivy.net/38992058484voshv.pdfIn PDF document text
    • http://posadukik.getenjoyment.net/bagowukorekapabekejobuded.pdfIn PDF document text
    • http://the-job.ru/pi_music_player_2._6_6_pro_apkpure8bzwe.pdfIn PDF document text
    • http://lomigizukifomor.22web.org/gimp_flyer_templates.pdfIn PDF document text
    • http://policyhelpcenter.com/65954989938o6xol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://titegerekarirov.rf.gd/makotemiku.pdfIn PDF document text
    • https://ff0b3df2-dc61-4aeb-9024-93fa9b5bc175.filesusr.com/ugd/aa14a9_41313750ff134088a7182d21ddaeea65.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca45511c-2afc-40eb-b29f-e39ded338c1c/reliability_engineering_master_degree.pdfIn PDF document text
    • https://0926596c-b1e6-4473-87d6-fed2e709bfeb.filesusr.com/ugd/e2a635_34b9e10e4a724c33b4d0da4f8ab956b1.pdf?index=trueIn PDF document text
    • http://molujafit.atwebpages.com/hadees_bukhari_shareef_urdu.pdfIn PDF document text
    • http://fomepufasele.atwebpages.com/kadanudopobugamizaleveriv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ceb2849-205a-4cb8-b703-0b66139f32d5/english_conversation_topics_for_high_school_students.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfd844a8-be0e-43fc-9c24-e3b7c42e29c5/programmable_logic_controllers_kelvin_t_erickson_free_download.pdfIn PDF document text
    • http://serumisa.epizy.com/antenna_polarization.pdfIn PDF document text
    • http://xifeloj.onlinewebshop.net/jasivikowemax.pdfIn PDF document text
    • https://37991ae0-d72b-4ccf-bf90-288dedd591e7.filesusr.com/ugd/041b56_fa5af34625694111ab14d0699cdbe8f0.pdf?index=trueIn PDF document text
    • http://jumebesatupa.epizy.com/67373988800.pdfIn PDF document text
    • https://ac09d6fb-20d1-47e2-97cb-2568fc137cdf.filesusr.com/ugd/03dcd4_8872176abe8a429597f62867d1c86a55.pdf?index=trueIn PDF document text
    • http://vakogez.myartsonline.com/varorefa.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_off00010290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10290 5116 bytes
SHA-256: 3aca46f648db4e71771e8ce60e8a71d286a99300147c7764d27c512af196b5fc
font_01_sfnt_off000113c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113C3 11520 bytes
SHA-256: cd60bf9c574595b5fc7da57aca8d344d3d850144b6b95d4d7cd15059863ee113

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