Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba17f6325baeab40…

MALICIOUS

PDF

74.9 KB Created: 2021-09-16 17:24:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0086bc43733827dfcec5cb005530284c SHA-1: a56a99ed6194adc39e3b17925d58afed00ce3c0c SHA-256: ba17f6325baeab403e17cc8ebab44984400c8ab179cf325e077b29dad267e20e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or are part of a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure suggests a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://wastran.ru/uplcv?utm_term=walkthrough+ninjago+tournament+apk PDF link annotation
    • http://www.awakohchang.com/image/upload/File/ufovolidajuwifaxunun.pdfIn PDF document text
    • http://nasfthr.com/userfiles/file/68034584165.pdfIn PDF document text
    • http://quaretti.it/userfiles/files/pazoru.pdfIn PDF document text
    • http://edmo-cars.nl/images/file/tipasanulakujuzi.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f09117bc81---lugapubijozojuvadu.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613cc37a294f7---36567313265.pdfIn PDF document text
    • http://prestopc.it/upload/file/92345076957.pdfIn PDF document text
    • https://himalayanthailand.com/image/upload/File/wumomapowibixu.pdfIn PDF document text
    • http://tydafa.com/dafa/uploadfiles/20210908161002.pdfIn PDF document text
    • http://www.ags-sib.ru/ckfinder/userfiles/files/97201665955.pdfIn PDF document text
    • https://satbietthu.com/luutru/files/rowakow.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/tanufopajamijexof.pdfIn PDF document text
    • https://ykitraders.com/UserFiles/file/kotebekili.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/8f8c37dc8ccb680cfa1968f6eb278dd9/rebezepodekoboj.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/6kle9gc867tum9ak9q4ufl77cl/tafozazaderuvuxuri.pdfIn PDF document text
    • https://cuatudongnhatrang.com/uploads/files/nedutetekejal.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161393fdb549dd---28944082398.pdfIn PDF document text
    • http://underbutter.cz/download/foto/wigupegobu.pdfIn PDF document text
    • https://hygradeinsulators.com/images/uploads/file/gaxipexasudafuvagowi.pdfIn PDF document text
    • http://scoutpate.com/userfiles/file/58500078811.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132228f1657e---nulosiluvufusilukogikevo.pdfIn PDF document text
    • http://xy-interior.com/uploads/files/202109030804427992.pdfIn PDF document text
    • https://kop-trans.pl/uploads/userfiles/files/kulokuvuzisedip.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_off0000be33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE33 10848 bytes
SHA-256: b46df28e9bd30cef56c23a60381b2e58abef4a88e920d89962ab70f4fcb16190
font_01_sfnt_off0000d701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD701 18252 bytes
SHA-256: 29df89a663c137af9ba1148a014c7d4159c486ea8d18b8f76ac6bf8230952c7e
font_02_sfnt_off000105fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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