Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dbce810be157708…

MALICIOUS

PDF

220.7 KB Created: 2021-08-02 06:29:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 989c69cff40b7e36398adf93fbc70d2f SHA-1: 3dbc266e6e2a0aee8b82028ca5cdc8a05551a6c3 SHA-256: 3dbce810be1577084b6ef59ddc01eb146c1f0b825c2f0e70aa731d95f39c7ca7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 5

  • 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.
  • 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://pistant.ru/uplcv?utm_term=huawei+p20+lite+android+9+update PDF link annotation
    • http://myapartment.de/web/editor/files/velela.pdfIn PDF document text
    • https://greenfuturevietnam.com/Upload/files/6797804045.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e349de52490---57907383176.pdfIn PDF document text
    • http://kameleonhastanc.hu/files/file/bolisoxegenovimolez.pdfIn PDF document text
    • https://devcons.org/uploads/userfiles/files/xiganamegalevakir.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c7df8be7c47c8272584c430c2b0d45ca/fonaporizoxa.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/files/faxekedekudewatumaxenax.pdfIn PDF document text
    • http://happy-travel089.com/CKEdit/upload/files/xulipirisoxutuguwin.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a35a9e1a7fb---sazadijadaveduzesa.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608371528efe0---35400257791.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/681011eca61d716f663e954d36674c9e/48497685325.pdfIn PDF document text
    • http://cuuhoatudong.com/upload/files/9729681308.pdfIn PDF document text
    • https://almuhja.net/ckfinder/userfiles/files/40733795634.pdfIn PDF document text
    • https://hanyauntuktesting.com/contents//files/94065729823.pdfIn PDF document text
    • http://hindel-relax.ch/ckfinder/userfiles/files/nemorolilazi.pdfIn PDF document text
    • http://hvpeds.com/upload/contents/file/tijisanumadog.pdfIn PDF document text
    • https://bangprice.combangprice.com/beta/cms_image/file/84451852046.pdfIn PDF document text
    • https://clinicscrm.com/img/files/jenuzofigevo.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607491ae8d372---dugodiladidaduda.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/4090b6ba2a0bcd66842aee6e9c977a75/rotetimumizefe.pdfIn PDF document text
    • http://studiotecnicomaglio.it/userfiles/files/71860108851.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160b5e63a8afc4---tipewu.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084de768d58e---jijefi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002e069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E069 7504 bytes
SHA-256: fa28a67141e51ca4f8c941b8cd120cf3e94eef999e2d1e8e1a1c7e9ea632afc4
font_01_sfnt_off0002f991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F991 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000311a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x311A3 22384 bytes
SHA-256: 38599bf134062912a200f6f920f5c2d1ece5145012ff4de1db330254ab239cdf
font_03_sfnt_off00034ab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34AB6 10804 bytes
SHA-256: 8b47f3f928b25a9f44271bf0c571c40426e8fba716db88f6314c489b244d4ab3