Malicious PDF — malware analysis report

Static analysis result for SHA-256 e10e5b337e8a86f6…

MALICIOUS

PDF

79.2 KB Created: 2021-09-19 23:18:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6ccee14c4e9826370cdcfd0ee8b9210b SHA-1: ed560f0e321176bc4177d429ce42dfd6ca2b1bef SHA-256: e10e5b337e8a86f6c3271ea248390f59469626d5def91373960ef63b7ecc7fe7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating it is likely a phishing or malware distribution document. It contains numerous links to external websites, some hosted on compromised CMS platforms, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and link farms points towards an effort to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://garglob.ru/uplcv?utm_term=android+setup+notification PDF link annotation
    • http://tjsyjdq.com/v15/Upload/file/20219192056346189.pdfIn PDF document text
    • http://boden.boj.se/uploads/userfiles/files/62453054576.pdfIn PDF document text
    • http://nemochem.cn/upload/files/92942159129.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/d1a2e1722b624914eb8d042e887586a1/72950831496.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/t2l019bcrprq9bo95rgjafc650/5757683622.pdfIn PDF document text
    • https://www.cdsale.org.au/application/third_party/ckfinder/userfiles/files/lulafefajubog.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/ni5cgsc5405nfif0satkvj2a2e/45684041329.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/ga51h706d3l73s9e5ounpco2l1/poburopafumazuzelume.pdfIn PDF document text
    • https://dcimx.com/files/nurageranosuromevuvexoj.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1612f06716d054---67934209483.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/8a0771d88ed157044596637efb971f3e/37366750914.pdfIn PDF document text
    • http://webs123.com/userfiles/file/mixavuxewumuzebuwude.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/xoruwasufenozelozarozole.pdfIn PDF document text
    • http://jan-fotografie.nl/upload/files/83375023396.pdfIn PDF document text
    • https://noursportevents.com/wheelmarine/userfiles/file/fugotajegulimefamerikape.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140fdd6c2d32---99188566070.pdfIn PDF document text
    • https://soi.icami.mx/ckfinder/userfiles/files/84497546529.pdfIn PDF document text
    • http://perilatomsk.ru/ckfinder/userfiles/files/66735590944.pdfIn PDF document text
    • http://chiangmai-esc.net/user_img/files/fodofijegonadugizusineki.pdfIn PDF document text
    • https://kenhquangcao.vn/uploads/files/83056592497.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d351dd7576---15844092631.pdfIn PDF document text
    • http://sinoorchids.com/image/file/25386665023.pdfIn PDF document text
    • http://archissimo.eu/userfiles/files/miluv.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_off0000d06d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD06D 18104 bytes
SHA-256: d89753060901189cd950c83d20a42e7f383623a35ddabc5a9b7cd5080aa1bd3e
font_01_sfnt_off0000fecf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFECF 10648 bytes
SHA-256: b42a70170c6b35f351e5c56283431c2ac4c0dfa2b69033e94f1a75b2ac44ef98
font_02_sfnt_off0001175c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1175C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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