Malicious PDF — malware analysis report

Static analysis result for SHA-256 a014ddc97f83e6e1…

MALICIOUS

PDF

85.3 KB Created: 2021-09-06 00:33:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 13d9a7fce0aae85db3e6fd88b9c61fdf SHA-1: b8b7ef12aafc70590564685ec69b149d000467e3 SHA-256: a014ddc97f83e6e1cc90f3d3e8a8f0772988b62f53d38d2bddbd3a9774fd06ec
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of links, many pointing to compromised WordPress sites. This suggests the document is designed as a link farm, potentially for SEO manipulation or to distribute malicious payloads. The ML classifier strongly indicated maliciousness, and the presence of multiple compromised domains reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • 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://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/a47168cd12886b78751039d67c8f8ad6/mekixokuriwifu.pdf In PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/8e28b01f9dd39c75aae6c0f31d20acf8/53179331517.pdfIn PDF document text
    • http://mweb.cz/images/file/kinogotedunosajalame.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/6s1f1tanblqbll8b5qrca80qi2/guxidizukubemenebufagip.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/9rvh5cqv7ghasnoek0enbrig4l/10328631708.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3724228aa9---goxokusatexisov.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/ddi17q36lj7hfh92c3rmb3na8r/96777420212.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/aohc1c8cn7gs0e9rstfa896ian/56714102373.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dcd4215b71---ladisokizoviri.pdfIn PDF document text
    • http://onlinetradeshow.ir/uploads/files/60791719572.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/oep036vshe3dtto6u49gj142nb/zinologuxoripubimawaguzi.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc9077571d---72214807337.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757a91eea61---24131131793.pdfIn PDF document text
    • https://salubrismd.com/wp-content/plugins/super-forms/uploads/php/files/1b1bb4ad79ea2d8dcf5f3b04cbf7fd55/45608216296.pdfIn PDF document text
    • http://www.gc-antey.ru/ckfinder/userfiles/files/zexojufamudujuzewij.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/9c79a82ce9302dbbf85f3b65434ca1ec/xifixagakigopilojegijodof.pdfIn PDF document text
    • http://dotacjedlaoze.pl/userfiles/file/nuwazovalizerogidubukudim.pdfIn PDF document text
    • http://momsystem.ru/public/file/zilabefipawozekimaxazel.pdfIn PDF document text
    • http://yao-cheng.com/uploadfiles/20210620185257.pdfIn PDF document text
    • https://lemanssrl.it/file/kunavowawerowojisow.pdfIn PDF document text
    • http://naplesredeals.com/userfiles/files/94749827173.pdfIn PDF document text
    • http://tensoinox.com/userfiles/files/67389015640.pdfIn PDF document text
    • https://nada70.org/userfiles/file/vilotikoj.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/51947036bc3e3475ad918b3298307fa2/mizusovit.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/16081646be60f5---bipapofawunixeborixufex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=modern+electromagnetic+scattering+theory+with+applications+pdfPDF 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_off0000e3e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fbf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF6 18884 bytes
SHA-256: 5aeda306631ab5cd191c50347d4442a55f88c8aa9cb657c071541817da2ef3db
font_02_sfnt_off00012c59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C59 11260 bytes
SHA-256: 248c6dae2b2def43fd63c10fa50ad9e8c88ce99bd901244141a68782d7bb87f4

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