Malicious PDF — malware analysis report

Static analysis result for SHA-256 5630155788e27ebe…

MALICIOUS

PDF

77.3 KB Created: 2021-03-15 13:55:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 26d69a935c07e578e44c1923643c4a58 SHA-1: 118c37627b9c446a318c5dab19217468efd66647 SHA-256: 5630155788e27ebeb07656b0f3e971f1e4b6a83b402cb13e8fe2a253585e8afb
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://druttle.ru/wix?keyword=king+kong+skull+island+download+in+tamil PDF link annotation
    • https://cdn.sqhk.co/joxopejufito/fnLigie/movistar_colombia_planes_de_datos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426087/normal_603b9d2897fe3.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzuvazol/hdhjghQ/hit_new_songs_tamil.pdfIn PDF document text
    • https://cdn.sqhk.co/melipetoluf/3jdLyig/rope_slash_mod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421623/normal_5fde9dd24d7e3.pdfIn PDF document text
    • https://cdn.sqhk.co/lubometusoz/AZxzhdJ/crossfire_volleyball_club.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479454/normal_600020d149ff4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448995/normal_5fe8f4839672d.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn 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/d5d73491-b666-44fe-b045-c869eae266ae/candide_voltaire_themes_abords.pdfIn PDF document text
    • http://xodemomawul.epizy.com/music_sheet_reading_book.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/formule_excel_arrondi__la_dizaine_suprieure.pdfIn PDF document text
    • http://jimatisejur.rf.gd/how_do_you_dilate_by_a_scale_factor_of_1_3.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/12928366292.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/logbook_template_australia.pdfIn PDF document text
    • http://zinizebaki.epizy.com/aws_amplify_android_sample.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb0e7010-b614-4920-bbf2-2592ac0acf5b/vuvaxiles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98e9a9df-9fbc-411f-a1d2-5c565eb70b74/briggs_and_stratton_725_series_ex_190cc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90d69a82-194d-4f59-be1a-973b198a703d/19536258871.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/revulorevobigalo.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/invalid_email_address_format.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/88990090078.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
stream_003_off0000e111.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE111 14408 bytes
SHA-256: 7f68a77087080c5d3a64ff2035cdd4d6a6cbd3e30ccf7ebecf39a0b36feead88
font_00_sfnt_off0000cf6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF6F 5176 bytes
SHA-256: 2bc511b7a32855fc7fb1c7d5fc93925f8578027e49ffaabb7a7feede492b5f16
font_02_sfnt_off00010409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10409 10468 bytes
SHA-256: dcd270a7b51e09e08fc8432c2c07338b1967cc04ed0dde65f4b8eaeed25f6fe0

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