Malicious PDF — malware analysis report

Static analysis result for SHA-256 e649a802d24d4079…

MALICIOUS

PDF

105.9 KB Created: 2021-07-20 07:06:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 0338dc40a3113b16215029948d39dfa0 SHA-1: 7d0c344dacd85025ca5b21eeb369092c6de1b6bd SHA-256: e649a802d24d4079a7a305dc371a86f4299121ca03cb149497115a3c1bcc400a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, detecting it as a phishing trojan. The document functions as a link farm, containing numerous URLs that point to other PDF files hosted on compromised websites. These external links are designed to lure users into downloading further malicious content, likely for phishing or malware distribution purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9863

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://odumakus.com/uploads/files/komonezigatanelowe.pdf In PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/41d2c50de76b5e296ad599df393f6abe/bibaxelijebavora.pdfIn PDF document text
    • http://vorne-sitzen.eu/pcms/content/file/5197370626.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f64f86c9bf---46270872197.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/pufeteter.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/22231dbc5609e303f90d774aec03eeb6/gabowoz.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/fec205ae15a0760803eb8bdbdc0377c3/xejawujuputapemuwazan.pdfIn PDF document text
    • https://wendi101.com/userfiles/file/jezutu.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/tafaxobedurexume.pdfIn PDF document text
    • http://izumrud38.com/ckfinder/userfiles/files/kovokiramolegotoriwis.pdfIn PDF document text
    • https://teenvolunteerhouston.org/wp-content/plugins/super-forms/uploads/php/files/fba35853e0919623c9114b5f16da6e61/xepebifum.pdfIn PDF document text
    • http://portalkucharski.pl/app/webroot/media/files/96017931345.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097f0f373738---90752633705.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e85ea7c1761---fanupo.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/6596d4171132e3633a0562201b0f39c6/53225970952.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/ef1fgk1b2c2qe5ktlm8hf7lkb2/vupixubugeju.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609e51fe63fef---fagilunure.pdfIn PDF document text
    • http://seoulmenu.com/uploads/files/39887094780.pdfIn PDF document text
    • http://sowitech.vn/upload/files/46318782346.pdfIn PDF document text
    • http://antonioruizabogados.es/userfiles/file/nisigaluxuzilorusibuduxo.pdfIn PDF document text
    • https://prokoncept.hu/admin/blogfck/image/file/newoluxapalawikaduw.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/af89533f0fca34da4b610090e3fbd360/jotulawawelumaxuli.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608cbb9152f95---89920264791.pdfIn PDF document text
    • http://guyfamilyreunion.com/clients/41950/File/domakogeraditojik.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=complied+with+meaningPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12315 18548 bytes
SHA-256: c3bef44fa280b02936277c70d9ec7998d88181a377b8710ce4cd72e756ad09a3
font_01_sfnt_off00015399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15399 10688 bytes
SHA-256: c0206cd8dba4fbd684f00446c2a7ddfd30fd8c7f008a74b5a7db1010c0168624
font_02_sfnt_off00016bbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BBB 16360 bytes
SHA-256: 5e8678e97791f3e25fcf0d3980dd1c58efff7bb08879cea3483d5f098d17407f
font_03_sfnt_off00018223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18223 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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