Malicious PDF — malware analysis report

Static analysis result for SHA-256 9658f0c056aba027…

MALICIOUS

PDF

72.7 KB Created: 2021-06-15 22:17:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 259cc6193c1d81edc570d89100098547 SHA-1: 46cf7a62c3afa888d4332ee7106619c3c498f8c0 SHA-256: 9658f0c056aba02771573a8f4301c25c8f91b022be22304233ec9c2337bb8d00
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm with numerous URLs pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of external URIs and the nature of the link farm indicate a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pixomot.ru/uplcv?utm_term=jiyo+re+bahubali+song+mp3 PDF link annotation
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/15e34a4f3b09b3608702be71e75cb02a/somak.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092ba207ce35---9450295403.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/28t8cg5js4s2juhdufpcqtgeoa/19439669348.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210522181139177.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/59217263801.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/3h1u73iupr5fhpg2baa7qb94c7/8824859006.pdfIn PDF document text
    • http://stark-tools.ru/images/uploaded/sasedituru.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccba2c09e3---31359016199.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/tupimiradijusalopizedexax.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/4c88ac396a45a9b6d4f26b48c8ad8e86/75896328018.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607b588d5bb38---rutitag.pdfIn PDF document text
    • http://ceomit.com/fckupload/file/xixip.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/e486177d21c12204a0d925efd52a05f5/lonadatubemakenamexota.pdfIn PDF document text
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089521ce13a6---zufogido.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c89c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC89C 5628 bytes
SHA-256: 503a0d50903c0b4677fda79e2f9eb0dd000d65b9cde2f39fa05006e182b95395
font_01_sfnt_off0000db9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9B 10576 bytes
SHA-256: 5b14428596ab6e0854c80002834ba1cc46b96bb29114c88ec835aa9b5160bf25
font_02_sfnt_off0000ffd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD1 16368 bytes
SHA-256: 8fbf93f29a95995cc6cb645ab60f08c4727de5fe45743dfa564a7ec0a59e9085