Malicious PDF — malware analysis report

Static analysis result for SHA-256 246f12e3a7e414e1…

MALICIOUS

PDF

86.6 KB Created: 2021-06-30 05:22:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: aa7de89f3b9b5a6367bb3086b9f930f9 SHA-1: a124ec2dd179a96402517fb088bf65f7b3e8a4f1 SHA-256: 246f12e3a7e414e16db3066a0a50bb0554233a3d93ff9ee49da06e7a8b306d1b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links pointing to compromised websites, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pistant.ru/uplcv?utm_term=red+scare+meaning PDF link annotation
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/ef5a02f262e96b80162aa9d06ebaa46c/jafojigitimimawoganozo.pdfIn PDF document text
    • http://leadershipcareer.kr/fckeditor/_upload/file/57660635023.pdfIn PDF document text
    • http://nextgt.eu/uploads/file/vonasut.pdfIn PDF document text
    • http://ypcalumni.com/clients/2/24/24042806289e0d450134266962f0a0d8/File/zemejikimisirovezape.pdfIn PDF document text
    • http://qca.ch/userfiles/file/loxibigitow.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089ff6bb6dc5---miguraranewukixedudi.pdfIn PDF document text
    • http://hiace-yoshikawa.com/js/upload/files/bexig.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608129efd27ac---48395445705.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/jelajaviwe.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a35615639ee---97598977118.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160860e271e116---94408502543.pdfIn PDF document text
    • http://nature-revive.org/files/file/gaworo.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/50bab5e9209f409558da3fc67276a6da/legolarima.pdfIn PDF document text
    • http://toyotarent.tw/FileData/ckfinder/files/20210619_FF6D80134D1B5C1A.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609eb12a26974---sepajujufisufofodenevege.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/2fe479a14f247278c16cd92103075382/xomavosetoxezamemaxijas.pdfIn PDF document text
    • http://churchtextile.com/userfiles/file/jemugaxufobulit.pdfIn PDF document text
    • http://naturallabs.de/userfiles/file/86738845057.pdfIn PDF document text
    • http://stellamaris.cz/userfiles/zetis.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/am5aq9madjueok6689d75qdsm4/faxexif.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a79dc562e83---texutoxazabijit.pdfIn PDF document text
    • https://zegabilisim.com/calisma2/files/uploads/pakurazi.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/eb037f72803f7a354e49a7f88df3c3fc/98214502155.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/5abd085be5c3a8fb2325f7143c07a536/17091802009.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_off0000edcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000105e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E1 18332 bytes
SHA-256: 99d32e8f878151de86a33e71a4d9e9bde2ffcf152a6efb5599324a5bc2c9c149
font_02_sfnt_off000135d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135D3 10492 bytes
SHA-256: d283da0e890cf6ba51f82a4775f314011abc78728de6b69e8378a1566d5d94ba

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