Malicious PDF — malware analysis report

Static analysis result for SHA-256 0abda225f9fbab02…

MALICIOUS

PDF

71.9 KB Created: 2021-09-11 19:50:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: dea6405c2d76f68d6b3f85aeab1ca4f2 SHA-1: ac2af57688e13491e354834f285162bef4fcea33 SHA-256: 0abda225f9fbab028eefc9e650ae84bb44860ac2e2c181cafe4804ef9f2b812d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. It also features numerous links pointing to compromised WordPress upload directories and disposable hosting, suggesting an attempt to host and distribute further malicious payloads or phishing content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://euro520.net/userfiles/file/16305860582121883611.pdf In PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1612ed21b03aaa---lokalatudagak.pdfIn PDF document text
    • https://houstoncoinshow.org/FCKeditor/file/77526665200.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16139968536fd1---segede.pdfIn PDF document text
    • http://mtkshop.com/images/uploads/file/zukapidananonag.pdfIn PDF document text
    • http://thepokewave.com/uploads/files/podozevegilolajagula.pdfIn PDF document text
    • http://pijntherapie.be/uploads/files/88068080349.pdfIn PDF document text
    • https://grandhotelbulgaria.com/userfiles/file/23141227260.pdfIn PDF document text
    • https://anglarill.net/userfiles/file/piwazasoxinoniwesuzev.pdfIn PDF document text
    • http://baove247.org/upload/files/wofuninotiwejifixos.pdfIn PDF document text
    • http://cascinamana.it/userfiles/file/xenifevejezidukixifipodu.pdfIn PDF document text
    • http://whipitleather.com/userfiles/file/rofiluwosedodolemevuw.pdfIn PDF document text
    • http://to-kajihan.net/js/upload/files/65749711519.pdfIn PDF document text
    • https://cosmeticdermatologymiamibeach.com/uploads/data/files/13822522543.pdfIn PDF document text
    • http://katela.net/userData/board/file/16606192613.pdfIn PDF document text
    • http://otevrel.eu/ckfinder/userfiles/files/senujibov.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/48a52a53f68d4f5f6327bad17090f74f/liwuwe.pdfIn PDF document text
    • http://granitemountainranch.net/userimages/rotibilasul.pdfIn PDF document text
    • https://mirrorlink.com/public/files/files/72501604342.pdfIn PDF document text
    • http://z-him.ru/userfiles/file/61351966416.pdfIn PDF document text
    • http://www.jacenter.org/js/ckfinder/userfiles/files/mesewikiribefo.pdfIn PDF document text
    • http://gradn.ru/uploades/fckeditorfile/84354011408.pdfIn PDF document text
    • https://marwaservicecenter.com/nbloom/fckuploads/file/dawokisetalutanenonupik.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=csr+racing+2+hack+ios+2021PDF 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_off0000b701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB701 10652 bytes
SHA-256: bbaace0a86038d8786562cd4ec2d7c9a8a81227053667bd39012b086fbbed3e3
font_01_sfnt_off0000cf62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF62 16552 bytes
SHA-256: bac6a57d9e88f0cac504de5eac3b676b1a4df273920463422ee9febf051b424d
font_02_sfnt_off0000fa58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA58 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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