Malicious PDF — malware analysis report

Static analysis result for SHA-256 060135539ae17af5…

MALICIOUS

PDF

70.0 KB Created: 2021-03-27 14:35:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3ce925321063508d70df973e40e7c678 SHA-1: 305d90bab248b0a33d71f8b36138c88609193d65 SHA-256: 060135539ae17af52e01592a6930f1f3b78c43ef1ca41bd3bc02f4b787f39c54
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 0.9997

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://dafemum.ru/award?keyword=os+argentinos+ariel+palacios+pdf PDF link annotation
    • http://fewudutizoxom.medianewsonline.com/24580921768.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369765/normal_605dbb07692c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489609/normal_602472cdcaad9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415309/normal_5fe52fcb9dd8b.pdfIn PDF document text
    • http://wufamega.scienceontheweb.net/descargar_gratis_libro_recetas_el_poder_del_metabolismo.pdfIn PDF document text
    • http://zexezolevonim.iblogger.org/metformina_antienvejecimiento.pdfIn PDF document text
    • http://pixujuxe.mypressonline.com/77903450782.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/21c0d875-8dd8-46cd-a9cf-2e9460a00f7b/kovasoxuvomumepuku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f904c817-8322-4ff3-b892-21e32f8b18fd/13869211749.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/almost_human_season_2_free.pdfIn PDF document text
    • http://vapufebifuv.epizy.com/aashto_m288_15.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b27c6cbb-9fb9-448a-b183-6697d768bcc8/80647565870.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/fireside_poets_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abc4354f-6572-41c8-a27d-95df1e8d9464/morogupojofubixumonewiko.pdfIn PDF document text
    • http://dinixebun.epizy.com/aluminium_sheets_for_sale_south_africa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37b42001-ad61-49d9-97cb-24955d0089aa/the_queen_of_attolia_read_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61758689-92f0-40e5-9a22-69945317a5c0/heart_of_darkness_movie_netflix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd7e4b89-c880-4c94-ae56-29bf2b6e7f3f/speech_punctuation_worksheet_year_6.pdfIn PDF document text
    • http://gusutawidike.epizy.com/mata_vaishno_devi_aarti_video.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/clavier_azerty_android_box.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_off0000d174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD174 5348 bytes
SHA-256: b0cbbcaf0000937e82de53cad87371c8f741ae33bdbb47ceaaab3e07069736f0
font_01_sfnt_off0000e3b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B1 12256 bytes
SHA-256: cbaadd06cf2b5f1d5e373fce31e388e69e1f285ade40411e23989533d1b404cc

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