Malicious PDF — malware analysis report

Static analysis result for SHA-256 456ed986b924ea57…

MALICIOUS

PDF

66.7 KB Created: 2021-06-21 15:03:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 548b027df9049bd63f8ed1caf66d7f97 SHA-1: beb66cfaa1cb98c834e4b3b7305a4468b3c7d93d SHA-256: 456ed986b924ea5773b5991c12cb106627c8d1a249107d305263104531715d93
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ML classification and ClamAV, as malicious and likely phishing-related. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The document's structure and embedded URLs indicate an attempt to lure users to potentially harmful sites, possibly for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://synerhu.ru/uplcv?utm_term=mile+converted+to+km PDF link annotation
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab8a6277e72---71550016006.pdfIn PDF document text
    • https://akbaturgame.com/calisma2/files/uploads/85484944716.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/sipepinulatepafexevonodu.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609be48fdeb70---nudepuvizi.pdfIn PDF document text
    • http://chithanhplastics.com/uploads/userfiles/file/2100953243.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/48397960527.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a1cc5c08c65---muwutabilekopu.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/002bc0cbfe5f64084c5281ea79e87276/zinitigijovaxevabaf.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160943c7b9191c---gubot.pdfIn PDF document text
    • http://wernitznigg.at/files/zijik.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/d191a898c430ead4f34de1476ae66c87/giteve.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/19cf373e5f512c73c325fe2542dd3834/pojedipelixebupas.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/65ef88a819314e09fc30ed22dfd3b876/pafogexukasevididok.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/4756b4d4160db7aaef1f91b291286cb3/tosenuwagebanifudevitopen.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/383f80d1c675ddff89240b2ecbf6d37e/52386787741.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8BF 4824 bytes
SHA-256: f5bf05c6c8fd8777a43c7178d67bc23c11f31b14b301a76dff5c0bd8ead8be7a
font_01_sfnt_off0000d923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD923 10936 bytes
SHA-256: ff423dbc37523cd8286dba3e78318cff05833c4fbd6959790eba6f00802a20de