Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc07d32dc416effc…

MALICIOUS

PDF

157.7 KB Created: 2021-06-12 14:28:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 0177d0e17fc6036cf27b4be8c49139f2 SHA-1: 93bb4a29009772e81614fefc4c7be6095e084eec SHA-256: cc07d32dc416effc055a8818821040c8e3ba99e6382707758bf9a9743712e14c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, directing users to various compromised websites and disposable hosting domains. The document body contains a lure related to 'Attack on Titan' to entice users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://cructi.ru/uplcv?utm_term=attack+on+titan+season+2+ep+6+eng+sub PDF link annotation
    • https://accuratesearch.com/userfiles/file/sipinikerawadewov.pdfIn PDF document text
    • http://starkhigh1972.com/clients/d/dd/dd83d6d7846a033806cdb512e10d7d7c/File/32175748732.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/7610ac80b2e755e7eb2166e61f74ce80/fetedexogo.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ac337186d---xivuzule.pdfIn PDF document text
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/160709d164e1de---lupusezabelusirigezep.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160aec2b903c6a---wabojadasaderoketajopemu.pdfIn PDF document text
    • http://coytex.net//ckfinder/userfiles/files/nuwodalulobigerotuvuz.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/26cd835f58853606ed0d6f7a56411fe6/tepusofigivotug.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/fizunawevelagelomuk.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/dcvaurts09f9bcpe55cd3ndar7/81274775470.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb44c7d2ca---86471774180.pdfIn PDF document text
    • http://bbpcosmetics.com/admin/upFiles/2021-5/file/kidamonekovazokebinikir.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1608cfa3e01a37---51076530506.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160765eaf8ce5d---fofivipemozivugov.pdfIn PDF document text
    • http://rld-carbon.ru/file/wigatatobivufigin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn 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_off00013138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13138 76200 bytes
SHA-256: 462645feb392588d0fca8b919d9c7a4f6aafd9fd2b80e43aafe890ff3d5b4cd3
font_01_sfnt_off000216ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x216CA 5452 bytes
SHA-256: 20692ba2620db2e93933c28ce7ca06f322c676711e2b71c10aa0743778659a71
font_02_sfnt_off00022973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22973 11528 bytes
SHA-256: 5f5c03a6dc8c14a8a651bc47ac9954f2cab9bcc0de5e9ab869f05e66f49210a1
font_03_sfnt_off00024f65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24F65 18404 bytes
SHA-256: ac14895c7f2ecb5f346557e0f4675e8d3a2e8830c4abac1a19a0aa9b9178471a