Malicious PDF — malware analysis report

Static analysis result for SHA-256 007b88011467e087…

MALICIOUS

PDF

78.1 KB Created: 2021-08-30 09:48:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6ad247abc65a93b07c8aedd98028554b SHA-1: 78c62cb05c172959ed0a6c86b17a24af0374bd25 SHA-256: 007b88011467e087e7645ac64dbb4b8461f6e5af7d76776b502ac5882d22b7a9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains embedded JavaScript and numerous URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting it functions as a link farm. The embedded JavaScript likely serves to redirect users to these malicious sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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 http://yuanyoujie.vip/userfiles/file/suwutelutu.pdf In PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3dd85d1b68---vexewaf.pdfIn PDF document text
    • https://tatsolarlight.com/uploads/files/zuvoxanararomadivowusugar.pdfIn PDF document text
    • https://protectname.xyz/whoisprivacy/userfiles/files/91529078142.pdfIn PDF document text
    • http://cheliabinsk.realxenon.ru/uploads/files/97189043781.pdfIn PDF document text
    • https://filetorme.com/upload/files/20584267152.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9e94a78431---56913398920.pdfIn PDF document text
    • http://serramentisiciliano.it/userfiles/files/sijazajesatanogevojinad.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/vikunedigejebufepinipega.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16071ad5e58cf8---41477645386.pdfIn PDF document text
    • http://khamtribacninh.com/images/files/muwunijudumibosaxem.pdfIn PDF document text
    • http://specimport.by/files/files/gogixumepavab.pdfIn PDF document text
    • http://pngroup.pl/ckfinder/userfiles/files/4909327903.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160ba983580ad2---xorobimonurazedotefilu.pdfIn PDF document text
    • https://bimetoor.com/basefile/bimetoorir/files/2582371720.pdfIn PDF document text
    • http://48bulls.com/js/upload/files/defosopego.pdfIn PDF document text
    • http://flemingfamilies.org/clients/8/8a/8af36a28baf44bfc7b8a7004fb4eaede/File/jiwigovekaniweguwifode.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac74a6f99e---tudanopaz.pdfIn PDF document text
    • http://zoo-foto.cz/userfiles/file/zinure.pdfIn PDF document text
    • https://fratellifurloni.it/file/donunigebobutewodax.pdfIn PDF document text
    • http://effektfilm.de/files/file/zebenusuzumox.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/52a76df442695e0026b618dc095ac179/34095912021.pdfIn PDF document text
    • https://indikino.com/ckfinder/userfiles/files/76962029754.pdfIn PDF document text
    • https://pacie.vn/web/uploads/files/26835118985.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16097dd3010512---86775281401.pdfIn PDF document text
    • https://alzubidi.com/userfiles/files/89318039304.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/rapofalovigafakomun.pdfIn PDF document text
    • http://manisafar.com/basefile/marcosafarir/files/58623269120.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=laughing+good+for+the+soulPDF 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_off0000cc04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC04 18084 bytes
SHA-256: 1935ce4c8853753a0feff3837cdbfb6b2fc7f0ce3c85c5cd9f22a7f98b068984
font_01_sfnt_off0000fa31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11248 10688 bytes
SHA-256: d3d6738e9df355d571f94eb73e734f9c655a2ba1cb913ebda7a0338cb08e20c3

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