Malicious PDF — malware analysis report

Static analysis result for SHA-256 d11eb22179e5dd69…

MALICIOUS

PDF

82.7 KB Created: 2021-09-20 15:48:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2d9602d5d4b038a8ebcf85c4d23985b7 SHA-1: 74e9a10af2ad1489540288a5e922145fa3312a1e SHA-256: d11eb22179e5dd69620e91c21b31feee9e14cbde69fdcd05f880cfd50ddf9f8d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs pointing to compromised WordPress sites and other domains, suggesting an attempt to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with a malicious PDF designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141f3ce93d2c---jurefaziwuwatipesisowi.pdf In PDF document text
    • https://aluvioneschicamocha.sinecsas.com/ckfinder/userfiles/files/wopev.pdfIn PDF document text
    • https://readandenjoy.ae/userfiles/files/94555578003.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145e4fc73406---26464984475.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161331274b74e3---jimajolojopazitifuz.pdfIn PDF document text
    • http://futimisdev.com/userfiles/file/19347932688.pdfIn PDF document text
    • http://fc-junajted.com/upload/datoteke/luriwifasasive.pdfIn PDF document text
    • http://stringquartet.biz/web/images/fck/file/50209957177.pdfIn PDF document text
    • http://clinivetmadonnadirosa.eu/userfiles/files/ginomuwurigazuwagaluke.pdfIn PDF document text
    • https://hirurgija.me/files/danikonigaverofupo.pdfIn PDF document text
    • http://xn--80aa5alfu.kz/file/41365452541.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/3683241a8c3df2aa8444859f1a5c05f8/14320944971.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/zejiteniwi.pdfIn PDF document text
    • http://agedwedfjtj.pretty-match.com/upload/files/20059680114.pdfIn PDF document text
    • https://granitabrasive.ro/editor_up/26865775881.pdfIn PDF document text
    • http://munnarinfo.in/userfiles/file/48505387271.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16145e7565f11f---bivuwiwari.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/buloregutowofulawen.pdfIn PDF document text
    • https://xuantruongtech.com/images/ckeditor/files/49106253490.pdfIn PDF document text
    • http://machin.kr/userData/board/file/vikab.pdfIn PDF document text
    • http://universalthailand.com/images/uploads/ckfinder/files/fodupegozedusulakeminaxiw.pdfIn PDF document text
    • https://value.ae/userfiles/file/rovor.pdfIn PDF document text
    • http://xn--2-140-swe8h.xn--p1ai/files/xerunowowosasosojulorixo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=tiktok+latest+apk+downloadPDF 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_off0000dc9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B4 10424 bytes
SHA-256: 86a37d73908a1feec43ab578b0e939babf7bdb69107ed75512bf09f5da68e86d
font_02_sfnt_off00010c8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C8C 18788 bytes
SHA-256: b56f867107190245751cf808fc461868100a6745de90113701124965a781e1f4

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