Malicious PDF — malware analysis report

Static analysis result for SHA-256 10f7773b576a311d…

MALICIOUS

PDF

87.4 KB Created: 2021-09-01 05:50:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7ba9d68b450cab77daf5339c91d4b7e4 SHA-1: 6f8eb8566c42d3c65063a8b7265df0033fe1f9a5 SHA-256: 10f7773b576a311d2f44074b83b92af64186dcda48d4a16d52522da4ec3d7953
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for executing malicious code. It also features a link farm pointing to multiple PDF files hosted on various domains, some of which appear to be compromised CMS uploads. This suggests the PDF is designed to lure users into clicking links that lead to further malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://investincarpathians.eu/app/webroot/media/files/35707814219.pdf In PDF document text
    • http://top1np.com/ckfinder/userfiles/files/47858348886.pdfIn PDF document text
    • http://christschoolblr.in/userfiles/file/34267051941.pdfIn PDF document text
    • http://thegreenlegacykeepers.com/clients/e/e8/e8dc17949b7ef813e9937e453902477f/File/piropuwudimizimorubexi.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/ee95ad6a1e13cceb78d6a0e0d9cd3eed/41773641784.pdfIn PDF document text
    • http://fsoa.cn/userfiles/file/28640026510.pdfIn PDF document text
    • https://parvazyab.com/basefile/api203/files/12887356036.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/fbqg8pnpqp5fbqqdvf7mhbopgp/wizukejewajuk.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16126f4e88cae4---dolokidezif.pdfIn PDF document text
    • http://ikuma-car.com/js/upload/files/23177400310.pdfIn PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/6a65f0903e3bd699d12bb6507051910b/dutite.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f81a0703f0---bapobozatokibowuzukel.pdfIn PDF document text
    • http://landpas.pl/upload/file/tozago.pdfIn PDF document text
    • https://ihappywash.com/uploads/files/202108240043536323.pdfIn PDF document text
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/oghfakno5ppb9gilm0qtrsp6c9/91735939434.pdfIn PDF document text
    • https://nibrasimansch.com/userfiles/files/fojexipekitexuvuxujow.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/8a1873eca8a278de9229857b2ff6f261/kisokotidew.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adabc84d0f9---25422962617.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/lilerrqqths5vfe454l57rb6b6/zinixenupufukidagiril.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/58dde635431eff937b0b1a65b86d7d05/98273806914.pdfIn PDF document text
    • https://apc-algercentre.dz/ckfinder/userfiles/files/majebuxowosipif.pdfIn PDF document text
    • https://bibliotheque.ville.deux-montagnes.qc.ca/ckfinder/userfiles/files/wikufoxidiga.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096172de48df---24737134611.pdfIn PDF document text
    • http://goref.ru/files/file/33808284545.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/1b779c8a77694c833a506aa31c2a7786/88426026547.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=father+of+the+symphony+crosswordPDF 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_off0000efec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEC 10924 bytes
SHA-256: 4a78c89df3f9a9ea166a235db92788732a488cdc6ac63a1caf5f5c0ce7570568
font_01_sfnt_off00010928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10928 17844 bytes
SHA-256: c4f08b5841f0ed25d1a3eb1a1fbc8e783b05f32ad573e192cb3c7221a545051d
font_02_sfnt_off0001376a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1376A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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