Malicious PDF — malware analysis report

Static analysis result for SHA-256 0812e2e4a5c69a6b…

MALICIOUS

PDF

147.1 KB Created: 2021-07-14 08:48:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: b5f2700ffbafa3ddc85fab010642fda7 SHA-1: 6a2ab649167adaa6688fe1a100c3f810122ceb84 SHA-256: 0812e2e4a5c69a6b3b2cfde5664290a57fcac1f84fa588efe686184016a925ac
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm, likely to host malicious content or facilitate phishing. The embedded JavaScript, while not fully analyzed due to obfuscation, is a common vector for further exploitation in PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9739

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/a8dba2608cd0af14ec74619a9f81be7a/96419235328.pdf In PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608ecc7d01926---nejuf.pdfIn PDF document text
    • https://responsible-tourism-alliance.com/content_file/files/veriludutuvasevenuvowovid.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/betejuzuzetogemizedovezu.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/4opmjof199m8vhsqsaunubq3k2/fosikonewebutunejekik.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/18787060081.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d085d693d---jagunenezejize.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/08239d77b3546b81a1fcabf1f3a258ef/laxopelebeluxitafexum.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/lebefilijabimabugarod.pdfIn PDF document text
    • http://boothbayharborshipyard.com/userfiles/file/14773614035.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbc290e99c9---zatesaresilexalogigi.pdfIn PDF document text
    • http://dom-2000.ru/ckfinder/userfiles/files/62891690298.pdfIn PDF document text
    • http://nhs71.com/clients/d/d9/d9c6bfbc4bbdd207836d30c01fe5869c/File/53884592403.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/55a492895bf60b5d1ff3a46a33abd692/47434263733.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/a4ff942bf5a0ee10bd1be2088517aef3/dazikatetozadomenit.pdfIn PDF document text
    • https://empezo.xyz/js/ckfinder/userfiles/files/dafesunefakukebega.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/90500897661.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160893372d957b---wamifosejol.pdfIn PDF document text
    • http://bukharaatlanta.com/sites/default/files/file/25579235002.pdfIn PDF document text
    • http://richiefamilyreunion.com/clients/7/7d/7d03816b951c94fc7c065ced7c7ccdcd/File/83151078138.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/jakakidofup.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a76b27942b---vugewive.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093e04a280a4---11190396109.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=the+linear+wave+equationPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001bd67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BD67 10400 bytes
SHA-256: c08d93430d24299b840420485d139ee57ea492dfbc85695f41ac9e5ddc5c34c6
font_01_sfnt_off0001d4e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D4E9 16084 bytes
SHA-256: 325c5f5cda05429ae92d15c23118ca1b8712e485108c584e1e30b0ff615913b7
font_02_sfnt_off0001ea11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EA11 23388 bytes
SHA-256: d0fc45e130b50b64550b649b5b50c7436746fe7af298568110320d0ed77e0817
font_03_sfnt_off000226df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x226DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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