Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e6e719082ec398…

MALICIOUS

PDF

75.3 KB Created: 2021-09-06 13:47:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0b15ceaed79a9225f8e91f7384d944fb SHA-1: 96fb867e9fcc74ff30361e64b32e6ce9fd7d4683 SHA-256: 80e6e719082ec3989ab9a90e24a115a8197d8c690da9444a802f5b8f41813645
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains a link farm that appears to be hosted on compromised WordPress sites, attempting to lure users with a fake download prompt for 'kannada story books pdf free download'. While no scripts were explicitly extracted, the nature of the link farm and the detection as a trojan suggest it likely serves as a dropper for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • 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.
  • 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://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077cd275713a---98931028791.pdf In PDF document text
    • https://ceccargiurgiu.ro/userfiles/file/75987689532.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e2cb6317df9---kapudesozawivosonerukube.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b37e400e986---zidupajabexivano.pdfIn PDF document text
    • http://planetamama.ru/files/file/61645409066.pdfIn PDF document text
    • http://attlas.center/userfiles/file/24561884312.pdfIn PDF document text
    • http://shuswapladystriders.ca/userfiles/file/77819143763.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/40a3ab3d961a8d74136727d4e0ad7798/xekalagufitebakajugajito.pdfIn PDF document text
    • http://beijingbeat.com/contents//files/86074123403.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/a8e479201dc2e6595eb38c643502b4cf/34305057543.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160815bb889bac---12279767655.pdfIn PDF document text
    • https://warungmimpishio2.com/contents//files/nudopiwegamobawenufonab.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/6a93099b0ed1cefd536088de668da1f0/13199477511.pdfIn PDF document text
    • http://technestudio.eu/userfiles/files/gajumiwik.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160b90f6ebcb3e---viwojewilal.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/161189d6ab833a---784122825.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/e663f23647380c16af147d539b6ecfac/71746961378.pdfIn PDF document text
    • https://flyags.com/editorResources/file///fumavatuzonujedobezas.pdfIn PDF document text
    • http://ticketsperiodico.com/galeria/files/karovami.pdfIn PDF document text
    • http://jowinbio.com/upload/files/202109012245556051.pdfIn PDF document text
    • http://efrex.cz/files/file/wuwikinubokivilovil.pdfIn PDF document text
    • http://ledins.lv/cms/file/mefejofitigotepuje.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c27ed52e3d---70686819007.pdfIn PDF document text
    • http://unsersohn.ch/images/file/moximobuful.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=kannada+story+books+pdf+free+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_off0000bc13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC13 19108 bytes
SHA-256: 862acd00c8315239cbfc5a6541c3df5ef9b5076881587bf9f96deb9f39695522
font_01_sfnt_off0000edf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001060a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060A 10824 bytes
SHA-256: 0dce9bb27ead72a666d0ac2a9263b45992ae45a2f50248a6044080f0e5c5e1d2