Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d9d14e5e70f9212…

MALICIOUS

PDF

83.4 KB Created: 2021-09-10 21:29:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 0017220c52cd7497d0f27f6205f25880 SHA-1: 61e42ee45a6479a343d3e06398372b93ec34cf03 SHA-256: 8d9d14e5e70f9212adc06cc9d50a434338d8a9cb281f9b2acdcc2b0dec796ea3
126 Risk Score

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 0.9911

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://pixomot.ru/uplcv?utm_term=vocabulary+start+with+a PDF link annotation
    • http://www.vishalsahni.com/public/ckfinder/userfiles/files/88874170904.pdfIn PDF document text
    • http://delve-cr.com/uploads/samikubosizoluvum.pdfIn PDF document text
    • https://garraldaarquitectura.com/garralda_userfiles/files/dolisulupofokoto.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/161352a436a372---xekajazoxumatuvep.pdfIn PDF document text
    • http://rhondachem.com/d/files/zaref.pdfIn PDF document text
    • https://dottoridegregorio.it/public/file/19250870935.pdfIn PDF document text
    • http://santeh.md/img/files/ninaxu.pdfIn PDF document text
    • https://betamachinery.sa/other_files/File/48863115708.pdfIn PDF document text
    • http://internet-trade.cz/UserFiles/file/turejozakenevujuk.pdfIn PDF document text
    • http://eva.am/files/a489deba9f9d9e54.pdfIn PDF document text
    • http://dobraukraina.org/sites/all/sites/dobraukraina.org/files/wigakofopi.pdfIn PDF document text
    • http://thaide.org/userfiles/file/jilogome.pdfIn PDF document text
    • http://www.ocptecnology.com/admin/uploaded/fck/file/34022229208.pdfIn PDF document text
    • https://darshanam.com/ckfinder/userfiles/files/57393166658.pdfIn PDF document text
    • https://affordans.com/ckfinder/userfiles/files/bupedunapib.pdfIn PDF document text
    • http://rockhouseschool.com/rockhouse/uploads/files/rapagesimirodawumupa.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210905155146_980833588.pdfIn PDF document text
    • https://homecareangels.ca/files/files/files/redisarokapiligisuledimax.pdfIn PDF document text
    • http://cloudinfo01.smartevolve.com/images/ckeditor/files/vekipebekexekawebedasedo.pdfIn PDF document text
    • http://urjabatteries.in/userfiles/file/pavojixudekewinasaki.pdfIn PDF document text
    • http://gewald.ru/content/Files/kuwevunomuzawovos.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/68293068901.pdfIn PDF document text
    • http://tajesink.com/Uploadfiles/files/dizugusenefafasoda.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/93762abea977f378b59350430c7f6c73/koxowaxi.pdfIn PDF document text
    • https://indiantiffin4me.com/nbloom/fckuploads/file/86551526856.pdfIn PDF document text
    • http://kosmonautika.ee/ckfinder/userfiles/files/96544021021.pdfIn PDF document text
    • https://clove7.com/userfiles/file/3327743442.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA09 17920 bytes
SHA-256: 799eb2c451f07a9dfc350ca79090c8a5b11990b7c6e4593643a89d179f2397cb
font_02_sfnt_off000127bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127BB 10500 bytes
SHA-256: 3be7341c77181c8e63f3f8f4cdc517b88f8fbc44c77ab91050ce874eb56f2246

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