Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ea228746f6089d5…

MALICIOUS

PDF

83.4 KB Created: 2021-06-09 15:30:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 8b56796805f0b1d5cd34c902d06f8f0b SHA-1: 8977a458086ee660a6765b75ccc67986a7fbd26f SHA-256: 5ea228746f6089d54c3ffc4a2261f7ba171e08ebb54ebd8e8edc9d3e7a87948a
164 Risk Score

Malware Insights

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

This PDF file is classified as malicious by ClamAV and an ML model, indicating a high likelihood of malicious intent. The document contains numerous external links, many pointing to compromised WordPress sites, suggesting a link farm designed to distribute malware or phish users. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://philabc.ru/uplcv?utm_term=gta+5+download+apk+file PDF link annotation
    • http://davisfolk.net/clients/1/1f/1f1070e31f35868a9a13f38ee7dc887f/File/tuxazezerapowuvekuben.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1863cc1fa---parunitolinuzililovega.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094dafccab6b---22357668456.pdfIn PDF document text
    • http://etcad.net/np/upfile/file/48836766322.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/ecffdd3d16341cace9e187aba21d74e5/wemug.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/kup477gl705b0nrevv06l6lrlu/xabetewapitutow.pdfIn PDF document text
    • http://yuanjen.com/ckfinder/userfiles/files/samotiguzaxalidilutifanej.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec1bdb6b41---69249626671.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3300e2018b---tukumiratoxirotomekeven.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/cddae7348acbd5b25b837a2b8c51e8a8/xifufulowigewolitute.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/4a814632c0b1ad48be2c13e3de69e5f1/79225617645.pdfIn PDF document text
    • https://www.temsilcifirsatlari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e206783083---gokizavuraf.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16096bbf109250---lamixanusuwixerobitan.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_off00010882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10882 5072 bytes
SHA-256: 80d72b9e8bc9f9837d9c7b255b674e6e09f41fcb033d2614824b8c9c15a3e0e5
font_01_sfnt_off000119fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119FE 10976 bytes
SHA-256: 9e0067f6873d7a29e0fb763de7099d370f872d9b8bf8d54fe6dee2bf32922dec