Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1081f95ef2af19c…

MALICIOUS

PDF

75.4 KB Created: 2021-04-03 14:03:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2d8bf86dccf80bb9c881d24baf415989 SHA-1: c0914ac10718af72b1735d3861fc7b0ef82bc833 SHA-256: a1081f95ef2af19cf1e0c4ea01b47d06f68696668ff0d3ed8c462280a7a876d7
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 0.9996

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://xezojetit.ru/strik?utm_term=what+do+the+3+branches+of+government PDF link annotation
    • http://xbet1.fun/hp_p3015_fuser_gear_kitdx4s9.pdfIn PDF document text
    • http://igonlinesupport.com/how_much_do_sports_illustrated_models_get_paid13i5h.pdfIn PDF document text
    • http://casserlabs.xyz/883531476899egn6.pdfIn PDF document text
    • http://soinjaga.ru/gotonewupetejiteximibx4ago.pdfIn PDF document text
    • http://filmera.ru/one_of_us_is_lying_quotesq173r.pdfIn PDF document text
    • http://fartook.online/esquema_general_de_la_historia_natural_de_la_enfermedadkcq2q.pdfIn PDF document text
    • http://lavorunolutoga.22web.org/free_assertiveness_training_worksheets.pdfIn PDF document text
    • http://shlifovka-pol.website/ragowipufolejiwirimo4kus4.pdfIn PDF document text
    • http://tiktokcopyrighthelpteam.com/spectral_graph_theoryqcqnc.pdfIn PDF document text
    • http://wei-nmvc.com/fivazobumakakupuvde7x.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/192d5a19-c53e-484e-a97d-4a669ff56c76/gubejerozugedavuzak.pdfIn PDF document text
    • https://bf6af823-cb0d-4ee8-9d5b-4f0b1de5ed24.filesusr.com/ugd/9eb187_549898a982244fba947097707a8379ab.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/951ca932-e81c-4007-aca9-04297c787dc4/what_are_the_four_points_of_darwins_theory_of_evolution_by_natural_selection.pdfIn PDF document text
    • https://37e0f79d-b0c1-4727-b76d-5b759c81288f.filesusr.com/ugd/9c66ff_aaf6918da9144ec085d49351420a923a.pdf?index=trueIn PDF document text
    • https://a146b927-ed54-472d-b3a8-6b137e313b92.filesusr.com/ugd/4d400c_70d577e8ac704691a6f55517c62eab3d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fovezewi/15488824965.pdfIn PDF document text
    • http://vugugevijoxudi.rf.gd/on_the_road_full_movie_download_in_hindi_480p.pdfIn PDF document text
    • http://wuvadofer.epizy.com/60926252996.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/7928495502.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/xerox_workcentre_7845_specifications.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/hp_probook_4530s_network_controller_drivers_for_windows_7_64_bit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cd973a5-1dda-4541-bdbe-30201384db14/6.0_powerstroke_transmission_cooler_line_routing.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_off0000e7d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D2 5780 bytes
SHA-256: a5bd36166b7e2f9cc6fc9a2377de78abe2a9c9886b776455389913a6585005b3
font_01_sfnt_off0000fb6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6E 10308 bytes
SHA-256: 186ed6ec8f2ebdd3cedc3ac34d51e8d478651fa008c04ccab5dbb0df464b768a

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