Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ed52343b6d3df9d…

MALICIOUS

PDF

82.7 KB Created: 2021-04-06 02:28:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 54b581a101c589443ae58965bd3bf97a SHA-1: 95cdcf6a4770757474a7ea8d67ff5c296b7dfe0c SHA-256: 5ed52343b6d3df9d5a936d5ddef3a83bbd42b9fead99d33e5503a3ae2fca56a2
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with several pointing to disposable domains and link farms, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically highlights the use of link farms on disposable hosting, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/aws?utm_term=nj+form+927+h+instructions PDF link annotation
    • https://cdn.sqhk.co/wobuwozavenu/dYnCZia/super_mario_bros_3_world_2_walkthrough.pdfIn PDF document text
    • http://fb-pageunderreview.com/limodaxeniweguqvmi6.pdfIn PDF document text
    • http://vovpomnim.ru/bimaxwgs82.pdfIn PDF document text
    • http://dkblogin-de.com/depezulavevogatuno9gaco.pdfIn PDF document text
    • http://weinmvc.net/avicii_best_songs4b93p.pdfIn PDF document text
    • http://alex-travel.moscow/resumen_del_libro_la_metamorfosis_franz_kafkag1rrn.pdfIn PDF document text
    • https://cdn.sqhk.co/kevekelobivo/W1UiaK1/swepco_phone_number_louisiana.pdfIn PDF document text
    • http://helpverifybadges.com/turezonuleravokodolisuvu5nofw.pdfIn PDF document text
    • http://doordash.link/wopinotetavomubohzmv6.pdfIn PDF document text
    • http://gratoraama.website/get_navigation_bar_height_androidjejvy.pdfIn PDF document text
    • http://hamlikjorettoop.ru/what_is_draining_my_moto_g_batteryvat6r.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zijevaru.rf.gd/supply_chain_risk_management_thesis.pdfIn PDF document text
    • http://juruzozesema.epizy.com/momotodasowajagokuxik.pdfIn PDF document text
    • https://5b2b9875-3923-4577-9ef6-0527498c95e7.filesusr.com/ugd/4e6dd5_59b8d65be3c146c7bf5c18be0431e094.pdf?index=trueIn PDF document text
    • http://volapubexu.epizy.com/zuvesepexoxamuwagugu.pdfIn PDF document text
    • http://sojikavufor.rf.gd/exponent_rules_worksheet_kuta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f3868d0-592b-4c14-8be3-c4fb33f1cb37/hp_laserjet_400_m401n_jam_in_cartridge_area.pdfIn PDF document text
    • https://23da7c74-6e14-424a-b22a-901aa35eafb1.filesusr.com/ugd/9cc572_6663235de4454691b2baf7ea8e04c860.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/be49f5aa-97b4-452e-aa79-f8a08715eb14/do_flammable_storage_cabinets_have_to_be_grounded.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c4b2dff-b846-48e2-aedc-7d206d896e55/vermont_castings_intrepid_1.pdfIn PDF document text
    • https://571cbd0a-ba82-408d-be6d-2df53a8fcfe5.filesusr.com/ugd/02af14_c08ed623ed214e4b88a4f2ca02c28e45.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/731af8de-5138-4eea-868e-02726149ab80/how_to_reset_a_bosch_washer_dryer.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_off000105b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B5 5292 bytes
SHA-256: fa2f230d614b5425642bbabd1bd2a7a210b07f1eee220bb9c1974db6555b6796
font_01_sfnt_off000117a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A2 10984 bytes
SHA-256: d9516d92777fa18ae54a2b5d6e1b647a24d8b8456c32c3d4b61aadd490869e51

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