Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddcdb1af8c9ec66d…

MALICIOUS

PDF

84.3 KB Created: 2021-09-17 22:00:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: cc40e5bcda8253c20308a98958571ec6 SHA-1: 44f7c3645cdd2bae8bc71557bab56bfba03f7a06 SHA-256: ddcdb1af8c9ec66decf10a136b93c349b5496274b85b2ae63a9218c86abd2fa4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of URLs pointing to various websites, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of creating link farms on disposable hosting, suggesting an attempt to distribute malicious content or phish users. The embedded JavaScript likely facilitates the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://irlanc.ru/uplcv?utm_term=camiling+tarlac+zip+code PDF link annotation
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614301e3d7731---siridolajiguvorez.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16131bf0cdba80---jekaxevadebokejeviwid.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cbae836a6c---77797195510.pdfIn PDF document text
    • http://ambvetsanprospero.eu/userfiles/files/kelavemupejatezupegug.pdfIn PDF document text
    • http://rubensova16.cz/files/file/gejitasovon.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/116695c9c3df8b905ee9cc8ebf85a137/sunajatiruvaj.pdfIn PDF document text
    • http://apple888.vn/luutru/files/23477883196.pdfIn PDF document text
    • https://www.khaosanpools.org/ckfinder/userfiles/files/nolumutogedukag.pdfIn PDF document text
    • http://tylincms.com/userfiles/files/28316468770.pdfIn PDF document text
    • http://aunay-sous-auneau.fr/ckfinder/userfiles/files/bepesofejikoravaruju.pdfIn PDF document text
    • https://calprin.com/ckfinder/userfiles/files/legelotadupijizovamopo.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/77350933551.pdfIn PDF document text
    • https://lienlacanien.com/img_pages/file/8271073824.pdfIn PDF document text
    • https://rtvpuls.com/ckfinder/userfiles/files/pizovapi.pdfIn PDF document text
    • http://www.taylormadetc.com/siteadmin/ckfinder/userfiles/files/47735554357.pdfIn PDF document text
    • http://kasaitogo.com/uploads/files/dojitubenij.pdfIn PDF document text
    • http://ge-mak.com/files/notivinelisuxifutuluno.pdfIn PDF document text
    • https://minervatech.work/js/ckfinder/userfiles/files/90239803302.pdfIn PDF document text
    • http://www.ezmoving.com/file/52132681803.pdfIn PDF document text
    • http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/sufivepizujulewawi.pdfIn PDF document text
    • http://www.web-globus.de/ckfinder/userfiles/files/97218705126.pdfIn PDF document text
    • https://www.disbel.es/ckfinder/userfiles/files/95486040537.pdfIn PDF document text
    • http://emiem.pl/public/upload/ckfinder/userfiles/files/12701929669.pdfIn PDF document text
    • http://topas.lt/userfiles/file/jivemumebuka.pdfIn PDF document text
    • https://travelworld.ro/userfiles/file/denosaguvazitonerolufezo.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_off0000e3a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A5 17836 bytes
SHA-256: a63769c6e0f337f267052b59131a2e9979a23d06e7e08b772a97dd49afae215d
font_01_sfnt_off0001123e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1123E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012a55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A55 10780 bytes
SHA-256: 6eb1f5acd095a48683f5032a2e572d51cd2a6d1149795f7ca743004623c92074

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