Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0c0f86e265d5320…

MALICIOUS

PDF

79.6 KB Created: 2021-09-04 06:45:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9b2ea24992cc793ed41be6131b5fc985 SHA-1: e1ffd439320b4912186be544a777fdcfdb93918d SHA-256: c0c0f86e265d5320841735075f45cc6f0f199b6d9ec4f721514e64a9547296a8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file functions as a link farm, containing numerous URLs pointing to compromised websites and disposable hosting. These links are likely intended to lure users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 https://archism.ru/uplcv?utm_term=multiplying+fractions+free+worksheets PDF link annotation
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/c8e1a1sm1fv23ue579e8cku834/fidasolomobebazudizaposa.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160827d61a3f59---midagejulasovu.pdfIn PDF document text
    • http://hornets88.com/clients/56662/File/vatexoz.pdfIn PDF document text
    • https://petek.biz/resimler/files/junulakosugikuxozasib.pdfIn PDF document text
    • http://ubest.ru/images/file/mosevoboniwe.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/3e263160ce170e53f2a492787308e9c9/jowolupenafajozizemizejaf.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983314de699---nivazegewumajinileso.pdfIn PDF document text
    • http://oaklandscreche.ie/userfiles/files/musalavowovoxite.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160968c8de0723---32029394840.pdfIn PDF document text
    • http://castudio.eu/userfiles/files/88010824704.pdfIn PDF document text
    • http://www.minaakshimajumdar.com/fckimages/file/teguzesavagawajakotu.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1fcf4dfd2c---pesojakixupufanijekesazi.pdfIn PDF document text
    • http://otoozevran.com/resimler/files/nubagudipununasizajaxu.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/5bfe971f369c21fef63c7b29ba13e551/pomafutavedow.pdfIn PDF document text
    • http://reklama-v-sochi.com/ckfinder/userfiles/files/65994477651.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/78132b5ed4ede5ef609ea8ca0de8fc8e/95048445694.pdfIn PDF document text
    • https://artcorner-fiberglass.com/userfiles/files/56578518482.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/2dbf84d5b28f4b13209ae4493970fc27/3353062614.pdfIn PDF document text
    • http://kawoka.com/userfiles/file/pezotifinaposidanurope.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611448cbe4092---1500037353.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611ca7a6eb518---tokatatiri.pdfIn PDF document text
    • https://www.kuwaitpolyurethane.com/ckfinder/userfiles/files/xasabefeterubof.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b204df7dc12---denakivijasijaramodejuma.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_off0000d138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD138 17576 bytes
SHA-256: 2d7a915de016d83306d88e2edfee0808afea87faf63e04d1f4567c96578a4abc
font_01_sfnt_off0000fe92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE92 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000116a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116A9 11144 bytes
SHA-256: 1fef7296c649d14f1b6c6d7408be72873a3b13fd315d00bc6f886c2de4a8290c

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