Malicious PDF — malware analysis report

Static analysis result for SHA-256 4297d57c70cdf8fd…

MALICIOUS

PDF

86.3 KB Created: 2021-09-01 22:52:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f58e97c808c574c769d7ec84dfef437c SHA-1: f7b296a6016634e836614bd9b99213b8620ac354 SHA-256: 4297d57c70cdf8fd2eebf99ff955c90e7a012e602082c0f1626617478e3213ed
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to exploit users by directing them to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1608de0f18437f---jofoduromuruwok.pdf In PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16093be98ea0e1---begorufipugi.pdfIn PDF document text
    • http://chretkinia.pl/userfiles/file/wodejitosib.pdfIn PDF document text
    • http://artgraf24.pl/userfiles/file/80940531512.pdfIn PDF document text
    • https://grup-insaat.com/userfiles/file/sifuwaluwig.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088829a58ac6---46440405486.pdfIn PDF document text
    • https://kede.org/userfiles/file/68240806144.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/873f69fc61dd2272b15a2e0f589656c0/zuxozogutorovol.pdfIn PDF document text
    • http://ilovechardonnayhills.com/userimages/66492057538.pdfIn PDF document text
    • http://yanartextil.com/firma/files/30498036396.pdfIn PDF document text
    • http://scamps.biz/userfiles/file/xegerasadedofu.pdfIn PDF document text
    • http://csc0516.com/userfiles/file/20210830060431_uiyx7d.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/r8a54c59fe030d20g1phbno8r2/48383408822.pdfIn PDF document text
    • https://mujeresenmovimientoplus.com/userfiles/file/5561580741.pdfIn PDF document text
    • https://weeb.nu/userfiles/file/pelutolumedawefasiwigu.pdfIn PDF document text
    • https://alzubidi.com/userfiles/files/basumebimezikopa.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bc7c86d4155---29075507834.pdfIn PDF document text
    • https://menu2uplus.com/images/file/xenerezurafu.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/e2e35762a56c88d330ec2af02c4eafce/pivonumoka.pdfIn PDF document text
    • https://classconnbio.com/img-jacson/files/92311203373.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/b5a1e2c57fccb82be53be7c597cf8c71/61718740463.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611e147ac565b---ginixewakupojosavebun.pdfIn PDF document text
    • https://fonixkoncert.hu/upload/file/pofififefo.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160948ecfa2355---lisaverunusofukabenepilo.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/62536624006.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbb14d05e21---80582029386.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=vray+for+beginnersPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB84 19016 bytes
SHA-256: 9ca8a4249e5f645bf0d3d0e86525d751971a740bfc17b40d3ec2d399ce8b45b4
font_01_sfnt_off00011c4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C4C 10468 bytes
SHA-256: ab5fa7e01e4b16109f361a0a92a1e236567f0501b8ef532bd26d8183af4f104f
font_02_sfnt_off00013439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13439 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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