Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d233cc3c8c03ec8…

MALICIOUS

PDF

86.0 KB Created: 2021-09-06 14:01:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4024fb922366257e700eaccd7777d002 SHA-1: 765ed7e49d2bc3966a22248e1d920c95f5548277 SHA-256: 9d233cc3c8c03ec8e94da654cca0b8db7e745b15df9378ae5f3ea834dfaefdeb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is often used to redirect users to malicious websites or download further payloads. The numerous extracted URLs, many pointing to compromised CMS uploads and disposable hosting, indicate a link farm designed to obscure the ultimate destination. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://pixomot.ru/uplcv?utm_term=microbiologist+resume+pdf PDF link annotation
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/86rb8ilpldo7g6nfolivfcefrh/39954769901.pdfIn PDF document text
    • http://perksys.com/userfiles/file/zapisupefuramitofo.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607edb908820d---68711310819.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609b524ebaa74---gunegakulu.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc8afae89d6---dowawikupesasomisozed.pdfIn PDF document text
    • http://baikalspring.ru/ckfinder/userfiles/files/sijotev.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607103648b82a---60620191790.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/06df1763ed05a8eba52fe5a12e131a3a/5349965714.pdfIn PDF document text
    • http://fondationmonetoile.org/clients/0/0e/0ecfe6182781ff486fe5156d2e85c11d/File/gizeritinevix.pdfIn PDF document text
    • https://penal-garazh.ru/files/92041435812.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075f56c6cfc2---39856388552.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160785d36be932---64491141454.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b4fc631c85---95393632722.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/9841a0c0b53e61523a2293c00efb2065/pasutiponodekebetifiju.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/4334405851.pdfIn PDF document text
    • https://zoomkish.com/basefile/zoomkishcom/files/negabiw.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ced8dd30c39---40610143037.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a23f4bda261---47916503248.pdfIn PDF document text
    • http://medi-sen.com/files/files/veraxatunivu.pdfIn PDF document text
    • https://birgatour.mn/js/ckfinder/userfiles/files/guzujusiziso.pdfIn PDF document text
    • https://snowcat.pl/admin/ckfinder/userfiles/files/mixubaxosizidedumup.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/fubiro.pdfIn PDF document text
    • https://hearing-outlet.com/uploads/files/202109030453533689.pdfIn PDF document text
    • http://xn--b1akwe.xn--p1ai/userfiles/file/rixidurimosekef.pdfIn PDF document text
    • http://aroma-es.red/yamituki-n/uploads/files/77547754095.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_off0000e787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE787 19448 bytes
SHA-256: bb0505590668b8dd087dcfd47b646a08b8f924440ce384cb817e1896c33d92e6
font_01_sfnt_off000118e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000130ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130FF 10932 bytes
SHA-256: 549e6dee3c981ac11c84cdf5ce867510a89247938597f36f6d720ea6d98b2664

Open this report in the interactive analyzer, or submit your own file for analysis.