Malicious PDF — malware analysis report

Static analysis result for SHA-256 b59a26add16c5d50…

MALICIOUS

PDF

81.0 KB Created: 2021-06-15 13:47:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: a7c58059ed932ed6d01b7c33fd20d0e1 SHA-1: bad0fd610838e51e6e6e4b1d8e95cb979f60ea15 SHA-256: b59a26add16c5d504aee9fee2353396725b2c6c0023fb7a315127642831a5594
164 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 numerous links, many pointing to compromised WordPress uploads or disposable hosting, suggesting a link farm designed to redirect users. One prominent URL, 'https://pixomot.ru/uplcv?utm_term=minecraft+java+edition+free+play', indicates a lure related to free Minecraft, likely a phishing or malware distribution attempt. No scripts were extracted, but the overall structure and URL patterns are consistent with a phishing or downloader campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=minecraft+java+edition+free+play PDF link annotation
    • https://bancodevida.com/bancodevida/admin/images/image/file/45912224548.pdfIn PDF document text
    • http://alexhofford.com/temp/files/file/solevab.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/vuwuvolavuwiwox.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/65aaa4b4ba3934165dbeb76084acfbfb/dozugevo.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/ugbhvu7bfci52cfosee2e8rjl9/42181186574.pdfIn PDF document text
    • https://loctra.net/userfiles/file/vikiviwejufikerox.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160af5da5b3c08---25523533398.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b7848d810---43597708199.pdfIn PDF document text
    • http://nousgarage.com/userfiles/file/rovugobisutis.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/bf870d2a80fb526e244fd84566894ab5/32163456609.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/18862734652.pdfIn PDF document text
    • http://pomocnaukowa.net/Upload/file/tulumugil.pdfIn PDF document text
    • http://davidhammerstein.org/userfiles/file/medelosepefi.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607d76da9e933---5803348063.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/jiloterufuvefe.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/9eb4f7c5df82f5b6aae9fb5ddd18d824/58123114050.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C1 5216 bytes
SHA-256: 5992afe18dc92cd0bfc8e423921d9f2621d0cc667edf02659087d8975bef5013
font_01_sfnt_off000106ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106AB 1860 bytes
SHA-256: a86adfeb4fe58fd49f1f2f5158d59fa190eb5805f5180df37ab84ca6d6492288
font_02_sfnt_off00010fbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBF 11356 bytes
SHA-256: 04060236410d17aa4062104ed8f414d241be91d7bc7a3fbf4be39683ff85b6c6