Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4c6de46c5adaea1…

MALICIOUS

PDF

71.4 KB Created: 2021-09-19 04:34:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: adc2bf2b26263c7da4a7854a86ab8c0b SHA-1: 5c1ebd1ef495d1704d0f8145f1d79b0b5dcd351e SHA-256: f4c6de46c5adaea1c9f9c353829ebaaa3f5d6374a7449fe265b2ae6a68137b85
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised or disposable domains, and one specifically uses 'utm_term=idm+lifetime+crack' suggesting a lure for software piracy. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classification strongly indicates malicious intent. The presence of embedded URLs and the nature of the links point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://chcial.ru/uplcv?utm_term=idm+lifetime+crack PDF link annotation
    • http://xn--2e0b95unoa536adofm5h.com/userfiles/file/zavapevexalajulusorodovaz.pdfIn PDF document text
    • http://solyaris.pro/admin/ckfinder/userfiles/files/39871754164.pdfIn PDF document text
    • http://bangiyaparishadtoronto.ca/bpt/editor/uploadfiles/1391608992.pdfIn PDF document text
    • http://maryalo.com/userData/board/file/rezuwabozajoz.pdfIn PDF document text
    • http://adveotec.com/img/file/37937136663.pdfIn PDF document text
    • https://peintures-descours.fr/fichier/files/96857365456.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/file/54621005074.pdfIn PDF document text
    • http://women-for-marriage.com/ckfinder/userfiles/files/lurimaxekenoduxir.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/fitevukimeleze.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/aa482a7f5a7719c2db976e044d072b52/jesanux.pdfIn PDF document text
    • https://grupa-energia.pl/attachments/file/fufudobagusefip.pdfIn PDF document text
    • http://studiobaliva.eu/userfiles/files/90919952404.pdfIn PDF document text
    • http://immobilieninvestors.com/userfiles/file/81191643507.pdfIn PDF document text
    • http://kraski-chernila.ru/resources/file/zopoweri.pdfIn PDF document text
    • http://dautuck.com/uploads/userfiles/file/xelurolisixamofebur.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/974b01c6f1c41d707f8dcad3ef005943/79444093183.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/5403475c820bb809b7583936fb9afa0d/32562100890.pdfIn PDF document text
    • https://hamayeshniroo.com/shop/file/wisisas.pdfIn PDF document text
    • http://bantinnhadat.com/users/files/17007296560.pdfIn PDF document text
    • https://maximatrimony.com/ckfinder/userfiles/files/98909836015.pdfIn PDF document text
    • https://o-dance.com/upload/files/menezajoven.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1614653ee19104---bagadejarad.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/mozodorabipagubaguri.pdfIn PDF document text
    • http://www.insight-assessment.com/ckfinder/userfiles/files/xotiruxelifuloziledasok.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_off0000b84c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB84C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD063 10288 bytes
SHA-256: e2f18005ca4b14b803bfb431594502dd7b82764475b4be2e564764bc88313451
font_02_sfnt_off0000e77e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77E 16056 bytes
SHA-256: d8001947755cb20921e0ba32be9b1a9e9f24ec60e006f4321b9534e223a52ffd

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