Malicious PDF — malware analysis report

Static analysis result for SHA-256 68f1d225c5634a09…

MALICIOUS

PDF

99.0 KB Created: 2021-08-25 23:19:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a2a0e4faced6f5abad5e6c458e812ad9 SHA-1: ba84e4fa0b62e48147e0959dacd7f02b86572639 SHA-256: 68f1d225c5634a09376045f38951e4af4616dc31faf88c545b5032e74a115154
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm designed for SEO manipulation or phishing. The presence of multiple unknown URLs suggests an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/3f96f07f5c46c7518efa804a7cba52e4/fafimoxenasekipu.pdf In PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/a2cf47660d21d4aad287a3d1add2fd5d/21531558918.pdfIn PDF document text
    • http://bnblspecialities.com/userfiles/files/54384441309.pdfIn PDF document text
    • http://perseverance.cyou/updatefiles/file/xikejidesizipowibekax.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/zewapokukewodurovotozoj.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609820b8d2eea---lolitenaborakurepekaw.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16106dad346189---foxopozapilajevibupibi.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/2c7423af13739c83ed76b19e0130df67/35389889247.pdfIn PDF document text
    • https://ta-taiwan.com/app/webroot/userfiles/files/41534103694.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc11f22c66---53279444615.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f75444ef80---96558734738.pdfIn PDF document text
    • http://suacuacuonthanhhoa.com/upload/files/kudodobafabesuganeg.pdfIn PDF document text
    • http://195exim.com/datas/files/pudogaj.pdfIn PDF document text
    • http://designpavelzapletal.cz/files/file/vinojegip.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/ca0bf78a15c65e6af6a5dc0c4d8d07a4/3961395367.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/duvasewojasa.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/3dbdf13ab4b2600fd65d30a020d88bc6/37247242169.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a11021246f9---tadebizisamixu.pdfIn PDF document text
    • https://minlinart.com/archive/upload/files/95004725317.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/b595648e07f22bcd88bd3b9ed60caf83/48186978064.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ffe7ee5d8ed---44511105444.pdfIn PDF document text
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608556627d649---94650935847.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/qr8opucho9jubcq7409evk9jr2/tuzirojetilizazilaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=independent+judiciary+in+democracyPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011bc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000133d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133D7 10756 bytes
SHA-256: 08f9cd13486f1ed2472c5d68037d790dcf83eaa96d28dec8f8016a6bf9f98ac9
font_02_sfnt_off00014c84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C84 18160 bytes
SHA-256: 7a94c46f232484ba36e3a5ae8bb06434bd97738983c313ced238073844109269

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