Malicious PDF — malware analysis report

Static analysis result for SHA-256 530cfc5182a360f2…

MALICIOUS

PDF

102.4 KB Created: 2021-07-16 00:04:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ab8f20b4f2196e40deb1f0a75bcc4a74 SHA-1: 754be343cafe4f4992c169022803c6f167727637 SHA-256: 530cfc5182a360f20f1929732653416819df7a0ffbec12b3b1bb9879a43bbd89
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting it functions as a link farm to distribute malicious content or conduct phishing attacks. The presence of external URIs and link farm characteristics indicates an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9687

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 https://inwebjor.ru/uplcv?utm_term=teacup+blue+french+bulldog+price PDF link annotation
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b5a4eaeda---86956754009.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ac60d00b9---pamulok.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/raioaq0b3dkj2fa72u3utnb7pp/jebufazaladelaregutolen.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608f32b7124d1---93208284010.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b5cf353f31---wilidas.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc48244386---4092886384.pdfIn PDF document text
    • http://harrisonfamilyreunion.org/clients/868801/File/11998037450.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/aba54ce91f211f4756dba3f83031e044/78162141150.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160ee46429a75b---49498691985.pdfIn PDF document text
    • http://capitaloffice.pl/fotki/file/ladejuropirapotobot.pdfIn PDF document text
    • https://digireg.nz/upload/43208670420.pdfIn PDF document text
    • https://west-holding.com/userfiles/file/53622110010.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/777102a2a6418a39ace61ae7675e9a70/medowuj.pdfIn PDF document text
    • https://kartplast.com/resimler/files/77598852014.pdfIn PDF document text
    • http://el-master.ru/userfiles/file/lupabotatatuliroreniwi.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/e5516042adf34ef7d82c914bc5e87d78/saragagor.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/xajewag.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/wafedekijinerazoxidas.pdfIn PDF document text
    • http://onishi-kyosendo.jp/archive/kemubusomexogizobe.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/58i3nvfggkq57ed60tsnhr51eq/memurom.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d9fea0f23---jovilep.pdfIn PDF document text
    • http://energo-winstal.pl/userfiles/file/badozixitowi.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/3f8997bc657f1bff9fdd58231881f566/29960806805.pdfIn PDF document text
    • http://landpas.pl/upload/file/xerafaxelajunotubasotene.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000109c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C6 16684 bytes
SHA-256: 5786d7639d2cc1522a1a3889fae5b5c9fbcbd5f5c9de2f5a2930a0e54327038d
font_01_sfnt_off00012163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12163 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13970 2636 bytes
SHA-256: 94d715ecd811953b7e1c24952c681b401dcd3a660985c965bc9867414a809968
font_03_sfnt_off00014486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14486 18244 bytes
SHA-256: 75eeda666900e7f6e0a5bad18257840975692763063b53b1e4cefac00e104da7
font_04_sfnt_off00017303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17303 10836 bytes
SHA-256: 26105dc97287e867ba96e125af447c6d4337e4d0a59ab9b23c4aad591142a1e2

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