Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a50a13684a9f8a2…

MALICIOUS

PDF

74.8 KB Created: 2021-09-11 15:29:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 963c5f0c47a6ea57b5d18e52607684d6 SHA-1: 4cf28f8a8590cf7a96bc721f39d0465e469374dc SHA-256: 1a50a13684a9f8a29687825275276a0854de96441c3004a3de73bbacd770cefe
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 0.9973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allytemp.ru/uplcv?utm_term=game+de+che+3+cho+android PDF link annotation
    • http://kientrucsangtrong.com/plus/files/kisilojinetus.pdfIn PDF document text
    • https://hsse.cl/files/33827020435.pdfIn PDF document text
    • https://simon-daulte.com/ckfinder/userfiles/files/28733369696.pdfIn PDF document text
    • https://albawadiroad.com/userfiles/files/wafepalosutamamapazimet.pdfIn PDF document text
    • http://www.colormotion.cz/UserFiles/file/69884751926.pdfIn PDF document text
    • http://caytrong.vn/Images_upload/files/8242180269.pdfIn PDF document text
    • https://shen-su.eu/gfx/userfiles/files/42587544538.pdfIn PDF document text
    • https://radekslodkiewicz.pl/files/file/komotalofizerejov.pdfIn PDF document text
    • https://ntc-container.com/upload/files/96370174836.pdfIn PDF document text
    • http://01host.ru/userfiles/files/tomidafudunijuxujukufo.pdfIn PDF document text
    • http://rigassprotes.lv/uploadz/file/18519990310.pdfIn PDF document text
    • https://mauspro.net/upload/files/30485865661.pdfIn PDF document text
    • http://isotope3.pm-ural.com/uploads/files/67832731365.pdfIn PDF document text
    • http://radis-rrl.ru/userfiles/image/95573714232.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/58f7af1e40676adcf74a177866b5f809/vasoxosadunoxisogomuzopo.pdfIn PDF document text
    • http://galsabino.it/userfiles/files/92459661257.pdfIn PDF document text
    • http://vagtteam.dk/userfiles/Files/desemoradoxoziradoz.pdfIn PDF document text
    • https://escolaalfa.com/userfiles/file/94375425522.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/kadarenamasupokukupew.pdfIn PDF document text
    • http://burchiellati.com/file_fck/file/84190461807.pdfIn PDF document text
    • http://zbraneklapka.cz/ckfinder/userfiles/files/61448053152.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/lolabe.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f22e98262f---vinaviwukiliwupefakojijan.pdfIn PDF document text
    • http://donghozibistore.com/luutru/files/76028198870.pdfIn PDF document text
    • https://srmhomes.com/images/bulk_images/files/kefudogigexopepijoxomanut.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b86e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB86E 10536 bytes
SHA-256: 2e8d3bd542f8f37acecc114be03eb85791c119ed166cecfa8ebbfd456fbdce07
font_01_sfnt_off0000d030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD030 20340 bytes
SHA-256: ffe3314acfd2131b2019c47cc1b801aaab46cd3c2f2674fdd58d38be11820f59
font_02_sfnt_off000105a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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