Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce3b550034caa2e7…

MALICIOUS

PDF

95.4 KB Created: 2021-08-26 08:21:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: 72167e20d251d34c218d6e34540d0c2a SHA-1: e928df3f60c266dfaf918fd79e59f39ffd519465 SHA-256: ce3b550034caa2e7cf6d75b3cd7c0c44cc93002a42d2ea07ac7695223d5c63fb
164 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised websites, many of which are hosted on disposable domains and utilize formcraft or super-forms plugins for file uploads. The presence of a 'download button' heuristic, combined with the ML classifier and ClamAV detection, strongly suggests a phishing or malware distribution attempt. The document body is heavily obfuscated and unreadable, providing no direct textual clues, but the overall structure and linked resources indicate a malicious intent to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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.
  • 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 http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdc6756f117---94797510234.pdf In PDF document text
    • https://lasanisports.com/files/tutoka.pdfIn PDF document text
    • http://soles2walk.cz/data/file/86911187555.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce6c678570---mavakuruporuwapebojudi.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/9af4567eb1e852ae14952abe6c00d116/wifefonugibupukugini.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c68259187ca---99820844181.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/hkovg0gkvpejs7i8vifpe9l2b0/fifutijiliwodekowipuj.pdfIn PDF document text
    • https://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/21a08e54d554ba2ace7c004fd5262167/8893816333.pdfIn PDF document text
    • http://phuketdriveschool.com/userfiles/file/42853602272.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021050212343875.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/gidojeximox.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/opu3tj1srmd4atbkutb0bfg3k1/pujojimovito.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/f691f2671440e37cbd1b9be2e7a9cd2c.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/1496395817.pdfIn PDF document text
    • https://maisonforville.be/documents/file/ropamebero.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16085079e284d0---53422548191.pdfIn PDF document text
    • http://audidalys.lt/ckfinder/userfiles/files/22424283744.pdfIn PDF document text
    • https://humicdp.com/uploads/2021-08-13/images/files/52513770152.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ae3c9f335---86524446377.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d89236ca2fc---fukajagaben.pdfIn PDF document text
    • https://lnpro.in/ckfinder/userfiles/files/53086627342.pdfIn PDF document text
    • https://medius.sk/userfiles/file/64688547920.pdfIn PDF document text
    • http://kocavietnam.com/upload/files/pokojorakemunukar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=rrb+ntpc+material+pdf+in+englishPDF link annotation
    • 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_off00010f2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F2B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001273d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1273D 17636 bytes
SHA-256: 2b5c56719d64072765328a88f084d3a4ef564d843fa871337359477cb0c132a1
font_02_sfnt_off000155c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155C5 11132 bytes
SHA-256: 2811d3f6fb6c27287eab72b4b77e910243fcaa076c4ecd956ee06b152519f4e0

Open this report in the interactive analyzer, or submit your own file for analysis.