Malicious PDF — malware analysis report

Static analysis result for SHA-256 7843e966e0f57405…

MALICIOUS

PDF

82.1 KB Created: 2021-07-30 21:59:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: bca39e31bf41a369454c7c67e69ea332 SHA-1: bab671db83006eaf74d9716867c624b135e5c83b SHA-256: 7843e966e0f57405c24354aa8f1b4730e038ee64e28c8a6b0d650cb7e5ac0cf8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that contains numerous links to external websites, many of which appear to be compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of external URIs and link farm heuristics points to an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • 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://pixomot.ru/uplcv?utm_term=the+lazarus+effect+movie+download+in+hindi+480p PDF link annotation
    • http://heyumpnd.com/userfiles/file///95404144934.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c72bf4b1177---22949769437.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160c65784a08aa---nefuwuwijaj.pdfIn PDF document text
    • http://qzgj.cn/upload/file/mubavibule.pdfIn PDF document text
    • https://jajugroup.com/ckfinder/userfiles/files/71817624110.pdfIn PDF document text
    • https://amadesafar.ir/basefile/amadesafarir/files/sekuduwuzulajijedobu.pdfIn PDF document text
    • http://firmen-bekleidung.at/userfiles/file/54262836792.pdfIn PDF document text
    • https://alrashed-alsaleh.com/userfiles/files/83899863510.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7a38354fa---sobabesusirat.pdfIn PDF document text
    • http://keramann.ru/uploads/files/jutalirer.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c6496737114---61283179532.pdfIn PDF document text
    • http://josephfellerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/25954601804.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/c22c5442528b5ad92f3c9b2f287d9677/26684419874.pdfIn PDF document text
    • http://tulsamemorialclassof71.com/clients/84987/File/59974557100.pdfIn PDF document text
    • http://rld-carbon.ru/file/gixulot.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/beparotesotoziditiwa.pdfIn PDF document text
    • http://deborahbrown.us/clients/860103/File/xanisifepa.pdfIn PDF document text
    • http://komputerzagrosze.pl/userfiles/file/61356309982.pdfIn PDF document text
    • https://funcarele.com/ckfinder/userfiles/files/xabixapogomaxawepet.pdfIn PDF document text
    • http://budohurtsa.pl/userfiles/file/gukesisu.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/178794ba4fb6a30e438ac8991b58d9d5/xumubux.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/b4a769f2c33684b4004c265fdd2b98fc/durufetelotiweloxilut.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160fd0fb53380d---88130301379.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/sekivose.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/revij.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_off0000d862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD862 17152 bytes
SHA-256: a3a96716be4f892417dd06ac935ec905343d51ee4f6774f57da09c4880a90fd8
font_01_sfnt_off00010514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10514 11568 bytes
SHA-256: f3ddaed276ac6072a90c80ecb015da8b4c81216769082bedc2f590d73f934c42
font_02_sfnt_off0001207e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1207E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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