Malicious PDF — malware analysis report

Static analysis result for SHA-256 abb5ae9e934759f0…

MALICIOUS

PDF

83.6 KB Created: 2021-09-18 08:01:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8de4dde42138f25eca6568d3c706f5fe SHA-1: 88ec2dc3e9c40fdd36198afd9ab1626acedf07c9 SHA-256: abb5ae9e934759f00488fc9b612797a1fd2c0180fa83ccde59cfa0215f324164
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The presence of embedded JavaScript and a high number of external links, many pointing to compromised or disposable hosting, strongly suggests malicious intent. The ML classifier and ClamAV detection further corroborate this, indicating the PDF is likely used for phishing or to download further malicious content. The embedded JavaScript is a common technique for executing malicious code within a PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://bhandarisurgical.com/ckfinder/userfiles/files/biwaxegibuzegevorupikugij.pdf In PDF document text
    • http://fobas.cz/userfiles/file/nejagunetatu.pdfIn PDF document text
    • http://ntvietnga.com/upload/files/94193195278.pdfIn PDF document text
    • https://pioneerlift.com/upfiles/editor/files/15802217201.pdfIn PDF document text
    • http://soloparamideco.com/js/new/fckeditor/userfiles/file/77046456104.pdfIn PDF document text
    • http://oris-am.com/editor_up/pavugutabimejeri.pdfIn PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/jexagoritosokamosag.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/39atrhmcc6phou3hnrmdvb89pc/vexatuwa.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613b1016bbb00---32662853981.pdfIn PDF document text
    • http://stelmart.ru/userfiles/file/64986576805.pdfIn PDF document text
    • http://daiwavn.com/uploads/image/files/sogat.pdfIn PDF document text
    • http://tryinvest.eu/userfiles/files/25149574084.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/96b59cb48dd003c9d1debbb93c2cc4ab/kixaxidukavibas.pdfIn PDF document text
    • http://a2hgghk.handylover.com/upload/files/89881381506.pdfIn PDF document text
    • https://tcremich.lu/files/files/sujuworezakow.pdfIn PDF document text
    • http://diadiemvui.com/upload/files/jesod.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/2bde0d34def31087628f6aa8350eea90/xilolimiv.pdfIn PDF document text
    • http://issaproject.com/app/views/panel/ckfinder/userfiles/files/16560286009.pdfIn PDF document text
    • http://eikenhorstgroep.nl/userfiles/file/6987691548.pdfIn PDF document text
    • https://hijaustabilo.com/contents/files/dobifasotuwejisisivopusuj.pdfIn PDF document text
    • https://futurefacesmiami.com/uploads/file/tijumonix.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/46198521473.pdfIn PDF document text
    • http://ranjitabiswas.com/userfiles/files/77744940913.pdfIn PDF document text
    • https://siroyensao.com/upload/files/xiwazawiwirosetuwikesobaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=how+to+change+notification+sounds+for+different+apps+androidPDF 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_off0000def7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f70e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF70E 11028 bytes
SHA-256: 2ef5a21d105ca428564a07917c7918dbf3ed7fd8eb814676e087dc0bc909c620
font_02_sfnt_off00011080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11080 18256 bytes
SHA-256: 46226d35048ef25cf9f84a4b4dd559544b43fdc11e883168c09be544662cbd32

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