Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe7bc49a1ecb4469…

MALICIOUS

PDF

88.2 KB Created: 2021-07-19 10:02:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: f9c199ff609a40f2d9c164a89844a173 SHA-1: 944e73fbce4b10549bc6153a78efacb9a08f08ba SHA-256: fe7bc49a1ecb44696cbc61193e2f8d087b18a0bbcaed07ddd6c4a350bd3403d7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://www.pavimentosyreformasferlu.es/ckfinder/userfiles/files/gudisebopof.pdf In PDF document text
    • https://uppersanduskyrotary.com/cms/files/File/68979160306.pdfIn PDF document text
    • http://wintec-samu.hu/uploads/files/gadevejof.pdfIn PDF document text
    • http://blesk-stroy.ru/userfiles/files/gevuluvidavosegezo.pdfIn PDF document text
    • http://www.haztartasigepszakuzlet.hu/pics/file/wotidomakaxupe.pdfIn PDF document text
    • http://bjjiffy.com/upload/rugulirafevejesidometeraj.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/26627412073.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16089c3e0ceeea---58458020008.pdfIn PDF document text
    • http://bannails.com/fckeditor_userfiles/file/4294220235.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/dvgbao5h204v9rfm3qabmv4ccr/54201123258.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/258139410d79c011ebefc489f2fc0814/jufutarumozojosuketati.pdfIn PDF document text
    • http://suachuaspa.com/upload/images-content/files/99415536484.pdfIn PDF document text
    • https://lacecinella.com/writable/public/userfiles/file/91152326069.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/betorunimukenadawepavitof.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070463ebe8ff---masuzazowexojoboxudes.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160ad2b171f184---pupazajiputup.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/3a7eba531fadd5bf110a963b60f4e5e7/73018318144.pdfIn PDF document text
    • http://s-privod.ru/userfiles/file/wonomojekenurekesene.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160bf2e5d25d49---sadunudeximaburiweve.pdfIn PDF document text
    • https://arab-hams.com/Ups/files/89638471709.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/16798631051.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a67ec3645ae---xepowimudilagoxevem.pdfIn PDF document text
    • http://ahchala.com/img/file/20998245987.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=mts+to+mov+converter+freePDF link annotation
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5F 17192 bytes
SHA-256: 675c6d6805b17837980e6e258fd6ce623056a6cf982fc5d8e1c5447c8e2f391b
font_01_sfnt_off00011980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11980 1868 bytes
SHA-256: 0d7f95a40e7cc2e2968fa25bad6169268846c55dd6bbf5d55bdeb3f4b765bb74
font_02_sfnt_off00012240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12240 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00013a57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A57 10256 bytes
SHA-256: f28e92546b60bfaa611d77dd7883f5a5de93ec60716c06543d6217ee6efe5a88

Open this report in the interactive analyzer, or submit your own file for analysis.