Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b2a582debf39f0d…

MALICIOUS

PDF

83.1 KB Created: 2021-09-17 13:58:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: bb622e55bd17b1efe7e9465791aca38f SHA-1: 287bf4d3f6f3ca9bfd5ac4f4a55193e13978878a SHA-256: 2b2a582debf39f0d065450c4ef1e9f8733f28b51fb3fa9f1b4842ad4e597172e
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs and link farm heuristics, suggesting it is designed to redirect users to compromised websites or potentially malicious content. The presence of multiple links on disposable hosting and compromised CMS upload storage further supports a malicious intent to distribute harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://synerhu.ru/uplcv?utm_term=moto+g+30+price+in+bangladesh PDF link annotation
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff5142e3f7---88091484512.pdfIn PDF document text
    • http://xn--b1agjlwjc3g.xn--p1ai/ckfinder/userfiles/files/fibonowubelujuwirogapebo.pdfIn PDF document text
    • http://residencecarlofelice.com/userfiles/files/13071797015.pdfIn PDF document text
    • https://www.agcontraincendios.es/ckfinder/userfiles/files/zepofatefe.pdfIn PDF document text
    • http://puebloexec.com/userfiles/file/taguk.pdfIn PDF document text
    • https://xenonsvjetla.com/files/89416860969.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/8f4ceb52bb8401544b4d62dcfaeb78b7/95186157776.pdfIn PDF document text
    • https://manajrgvaaradhi.com/cms-uploads/files/vizosagokorulalarane.pdfIn PDF document text
    • https://torbay.ru/images/uploads/file/58917856019.pdfIn PDF document text
    • http://tmacfashion.com/ckfinder/userfiles/files/10240754261.pdfIn PDF document text
    • http://galeriejacqueselbaz.com/userfiles/file/fewisemuxadasa.pdfIn PDF document text
    • https://safe-international.com/userfiles/file/57942843694.pdfIn PDF document text
    • https://triptoboloyfoundation.org/editorsfiles/files/74600489800.pdfIn PDF document text
    • http://123flower.doweb.kr/upload/files/wafon.pdfIn PDF document text
    • http://praguynakorn.com/praguynakorn/picture/datapro/files/89666017598.pdfIn PDF document text
    • https://condicionamentofisico.com/arquivos/file/7035815645.pdfIn PDF document text
    • https://andrejc.si/files/file/99876562939.pdfIn PDF document text
    • https://mami-m.com/Uploads/userfiles/files/20654964711.pdfIn PDF document text
    • https://malinaionescu.ro/userfiles/file/7778437034.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c689607df5---56699536019.pdfIn PDF document text
    • https://miguktour.com/FileData/ckfinder/files/20210914_88D413ED8FE90FC4.pdfIn PDF document text
    • https://maintogelonline.bet/contents/files/31138218414.pdfIn PDF document text
    • http://profstil.az/userfiles/file/68941370602.pdfIn PDF document text
    • http://anduong-nhatthanh.com/uploads/news_file/kewagoguxivofadebuvaseze.pdfIn PDF document text
    • http://movediary.com/userfiles/file/bufesosexi.pdfIn 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://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_off0000d9fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FB 11220 bytes
SHA-256: 9668c93940978e2ea6b9ae62b5e8b67cd5ec494d6bd321dc218350f20c7fe061
font_01_sfnt_off0000f3cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CB 19312 bytes
SHA-256: d438e0fcecc852ac8867f7be473714799567f138e3ed6ab69712975a4715b462
font_02_sfnt_off0001262e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1262E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1