Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d505ab682ef907d…

MALICIOUS

PDF

69.3 KB Created: 2021-09-24 20:01:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: d6825ed5c7fb3637694ea738f3dc4c8a SHA-1: b14e47c9185ba2a188725cdf8fc70dce53b0eb37 SHA-256: 6d505ab682ef907da0d1cb444f29dfb39050bd09ae1b35fe583224d6b8a62078
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or disposable hosting, indicating a link farm for SEO poisoning or phishing. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to malicious content or phishing pages. The embedded JavaScript is likely used to facilitate these redirects or further obfuscate the malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/uplcv?utm_term=how+to+remotely+control+android+phone+with+kali+linux PDF link annotation
    • http://thienlongadv.com/upload/files/18559543538.pdfIn PDF document text
    • http://corkpotters.com/images/velexabugibesi.pdfIn PDF document text
    • https://www.cosanuesa.com/componentes/editor/ckfinder/userfiles/files/kapokufit.pdfIn PDF document text
    • http://accapierre.it/userfiles/files/32808556718.pdfIn PDF document text
    • http://uteambio.com/upload/files/mutidabizupitudepudufugam.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/577098a527f8384e34ba7f77109e2940/dufinan.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/44134855278.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/edc7664efd1b422caa0bcb759b61069e/bokugatosonabavazalup.pdfIn PDF document text
    • http://studiotipaldo.com/userfiles/files/44537412821.pdfIn PDF document text
    • http://s2ipower.com/survey/userfiles/files/60853549514.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16143ad8251456---zomobofotemuxelixux.pdfIn PDF document text
    • http://avvocato-callegaro.it/public/file/sopilufuwor.pdfIn PDF document text
    • http://smcertificationservices.com/userfiles/files/vunolixazuz.pdfIn PDF document text
    • https://cr2tek.com/userfiles/Proj_Name/files/44618536762.pdfIn PDF document text
    • http://paintmaster.hu/js/ckfinder/userfiles/files/96966078389.pdfIn PDF document text
    • http://findacommodity.com/upload/file/bapezub.pdfIn PDF document text
    • https://dbhattacharjee.com/ckfinder/userfiles/files/fopuwufetapoxopobijefaves.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161410efe9ec7e---54091104715.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/e5bb0f816ed8c05568d76d2d1897efc2/52512594159.pdfIn PDF document text
    • http://szwygs.com/upload/vukon.pdfIn PDF document text
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/mupuvibawo.pdfIn PDF document text
    • https://rubin2000-distribuitorshop.ro/userfiles/file/wabupid.pdfIn PDF document text
    • http://evo-models.com/uploads/userfiles/files/mofalotaderezinatojifiwi.pdfIn PDF document text
    • https://juraganmonyet.com/contents/files/puwolarafowovolopezaxa.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_off0000aeec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEEC 15304 bytes
SHA-256: ab6698de85dd4fb2dfb173698d7be86315977cf095529a377ebc7fef60014fcf
font_01_sfnt_off0000d56e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD56E 11096 bytes
SHA-256: 383ac871adb8e4a5de4ad78ac1a8fdc2c7614e7961a5c844db2ea1995fb81942
font_02_sfnt_off0000ef23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF23 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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