Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8a2fc59e243388d…

MALICIOUS

PDF

81.4 KB Created: 2021-04-29 20:51:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 25895a48f50c931684b52e070ac93af5 SHA-1: c0ce554b4d95e17397ef95018eb4dc20d32baa4f SHA-256: c8a2fc59e243388dd144740d7b6477b722885f49cb72703e3286026abd848e71
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 0.9990

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://resalured.ru/strik?utm_term=naza+m+lite+manual+espa%25C3%25B1ol+pdf PDF link annotation
    • http://goshop32.site/wuvudopulivazatusunabo9a4li.pdfIn PDF document text
    • http://tixshopclub.space/power_air_fryer_oven_model_cm001_manualkm2ft.pdfIn PDF document text
    • https://winojarenegesut.weebly.com/uploads/1/3/4/4/134481716/fudoromidifo.pdfIn PDF document text
    • https://lufegema.weebly.com/uploads/1/3/4/1/134132410/70192a53.pdfIn PDF document text
    • http://pakirekugep.scienceontheweb.net/bergey_s_manual_of_systematic_bacteriology_volume_1_download.pdfIn PDF document text
    • http://laxogapajoze.getenjoyment.net/brian_tracy_no_excuses.pdfIn PDF document text
    • http://zujuzerawijuk.medianewsonline.com/physical_chemistry_adsorption.pdfIn PDF document text
    • http://jetelijunejuk.iblogger.org/affirmative_and_negative_sentences_rules.pdfIn PDF document text
    • http://espacecmb.xyz/opera_browser_portableu58vx.pdfIn PDF document text
    • http://bestunew.xyz/how_to_take_apart_a_frigidaire_affinity_dryerq77a6.pdfIn PDF document text
    • http://pemotutafid.mywebcommunity.org/absli_secure_plus_plan_brochure.pdfIn PDF document text
    • https://zuxosudeti.weebly.com/uploads/1/3/4/3/134359900/denigujow_kakagepakew.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/65e83a63-45aa-4532-8e17-dfb2d00ce98f/13879640360.pdfIn PDF document text
    • http://fapubogodomeduj.epizy.com/lerevagena.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5e30d83-6f39-4802-8ca6-49fee8b485c0/lazofubajidosi.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/resumo_livro_raizes_do_brasil_sergio_buarque_de_holanda.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/5164328605.pdfIn PDF document text
    • http://falowowujozaba.rf.gd/tiduluwodunolofe.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/screamin_eagle_efi_race_tuner_software.pdfIn PDF document text
    • http://gofosuxubajo.epizy.com/22537184173.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/what_type_of_transmission_fluid_does_a_2005_honda_odyssey_use.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1c4dfa9-fbee-4fa9-a7dc-5bec4c29fbad/elastic_band_exercise_routine.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/direct_speech_and_reported_speech_worksheet.pdfIn PDF document text
    • http://vomewudige.atwebpages.com/72381950066.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF3 4060 bytes
SHA-256: 1dd29548171b9e61669117b747f53c76a8e63096d888ad352aea30a278a76e61
font_01_sfnt_off0000fc67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC67 5320 bytes
SHA-256: 1d184f0205218618e6c962c094dd0c1d445dd10cb8f01a98764cd5cb3a9db5e7
font_02_sfnt_off00010e41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E41 12108 bytes
SHA-256: 4195ae24cc0501cf4f50f99792bc901c898e412c36ca2c864b26772d8e9a8603

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