Malicious PDF — malware analysis report

Static analysis result for SHA-256 f006ed846059fc91…

MALICIOUS

PDF

94.8 KB Created: 2021-09-20 19:49:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 28c7d458607b03d8e3c998d7802d3f41 SHA-1: 0da0612bfc72fbbc5f71482154e260f8edb643f2 SHA-256: f006ed846059fc9153585cd891ec9055066f4d6fc002774407dc54abf61744b3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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://krisoc.ru/uplcv?utm_term=free+punjabi+movies PDF link annotation
    • http://stilna-ya.com/_userfiles/file/bopoze.pdfIn PDF document text
    • http://dtjxbpzx.com/filespath/files/20210915140431.pdfIn PDF document text
    • https://hram-uspeniya.ru/ckfinder/userfiles/files/55035244641.pdfIn PDF document text
    • https://lawweb.info/mycms/admin/userfiles/file/53610637317.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16140be4cc8d43---zupuzalabutisijafadeduxe.pdfIn PDF document text
    • https://agri-mal.pl/userfiles/file/kuzodup.pdfIn PDF document text
    • http://www.jacenter.org/js/ckfinder/userfiles/files/jatapopojewoletopibusava.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614562f361666---73708135023.pdfIn PDF document text
    • http://abovomedia.hu/_user/file/98425601877.pdfIn PDF document text
    • http://balletpanov.com/uploads/files/kalubufotewuvexa.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/qpetcavu6tcqlje0k41aru9rdt/83235602938.pdfIn PDF document text
    • https://mkontakt.pl/dat/file/rutijidepibinudumalum.pdfIn PDF document text
    • https://digireg.lu/upload/fufiv.pdfIn PDF document text
    • http://xn--90aoj0agf7cq.xn--p1ai/uploads/files/6959622873.pdfIn PDF document text
    • http://seasonsblinds.com/uploads/ckfinder/userfiles/files/salupokelilud.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/26bf5d044063e66f73f4991b31fceee8/94760564325.pdfIn PDF document text
    • http://changrung.com/ckfinder/userfiles/files/89213346734.pdfIn PDF document text
    • https://sgicorp.com/userfiles/files/8952280682.pdfIn PDF document text
    • http://chinhsuasolieu.com/media/files/dedikorafojab.pdfIn PDF document text
    • http://cerritos.songhakbbq.com/uploads/files/94291265601.pdfIn PDF document text
    • http://aeusjtu.pretty-match.com/upload/files/zujigizutir.pdfIn PDF document text
    • http://clinical-pain.com/pds/userfiles/files/40796493835.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/ckfinder/userfiles/files/demiwowikerosexowa.pdfIn PDF document text
    • http://tandartsindex.nl/images/uploads/81389802123.pdfIn PDF document text
    • http://relindalouisylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/39198719449.pdfIn PDF document text
    • https://www.twibiotech.com/plugin/ce1/ckfinder/userfiles/files/53268345068.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_off00010f68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F68 17760 bytes
SHA-256: b773a40beee15061e35733f0a38b53fc2915853ff1a1928bff7914b8c062cdc7
font_01_sfnt_off00013dcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DCD 10684 bytes
SHA-256: 40b6f4b372636abed8b05461689a0cf8c98d549399e6c6d6fcd209cd4b7f4076
font_02_sfnt_off000155ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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