Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d5d10b40140dd67…

MALICIOUS

PDF

85.9 KB Created: 2021-07-14 02:12:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0a7491c1617373e5d1f8e062558eb9d0 SHA-1: efe2a98f9db513a2bc64ee89c54f2fea3a06f977 SHA-256: 0d5d10b40140dd674afa1c543d628de724e731c1bfdc9b5304364e468b9c7cc7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://allytemp.ru/uplcv?utm_term=cloud+computing+a+practical+approach+pdf PDF link annotation
    • http://sam-global.info/files/file/wigujexiwulaxijiku.pdfIn PDF document text
    • http://speaklifeiamgreatness.com/files/files/gimefujolozikuzele.pdfIn PDF document text
    • http://box8websites.com/ckfinder/userfiles/files/famurosezagenuwixesazem.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608476744af4f---17427036836.pdfIn PDF document text
    • http://srividyaastrology.com/userfiles/file/71920304067.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160706e6d7a74b---3423770790.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/u77ibbs0b0uamd0nloe1opveak/dipanijatutapizogifazupav.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202105/file/mugotiresavexob.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab5062b806---zularituv.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2039cca55---30501766834.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/93666117084.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/33f5ddb4b71a13c8a9cca62e4aa691e6/98130734705.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/lasixutozuwoli.pdfIn PDF document text
    • https://usssecuritate.ro/userfiles/file/gejirumedidopesogevakab.pdfIn PDF document text
    • http://lblussana.it/images/file/nosiripigez.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de83236e584---pobejamewifogumoxolelo.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f286f5cc72---vipopiniram.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160afc41d5eb7c---78411207282.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/783efedcfe9c46efb047774d3696b27a/tisinuzesozikaf.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608596302d0bf---kuwej.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/35432cdae194782026bcb7b30659ab40/polijuvepudawuka.pdfIn PDF document text
    • http://2990592.ru/ckfinder/userfiles/files/lutijovirivukijisabovodox.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/mejifebewuzemupusobajo.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1A 17440 bytes
SHA-256: 01dcd80d477e17c845387ce0d3111e074bdcf2e7e1b49cd8e8c8560e8cda2dbf
font_01_sfnt_off000117b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012fcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FCF 10900 bytes
SHA-256: b5b13da499b4bb8f3e12dbc0da2f99252ad715f3e73197769261469ee58d153e

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