Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d71f2098de61756…

MALICIOUS

PDF

82.2 KB Created: 2021-09-08 02:16:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 87a41b9e304a721624a5bb560263fad7 SHA-1: 446a114937a7d7d7026c1a6d5d1d83fdd85a227b SHA-256: 1d71f2098de61756dd4eb728bdebc4d88491d093c0fae5d76d6eefe7f8b126f6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of creating link farms on disposable hosting, suggesting an attempt to manipulate search engine rankings or redirect users to malicious content. The presence of embedded JavaScript and the overall structure strongly suggest a malicious intent, likely to host phishing pages or distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/1ee215f80246c5352e1f58dbfee26bf5/dupanirojarawus.pdf In PDF document text
    • http://capitolmetrophysicaltherapy.com/files/files/14485250522.pdfIn PDF document text
    • http://coinproject.com/userfiles/image/file/85129393157.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be026fedba0---mukuxerabekapuwiset.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/logijowezagedibid.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095a025aec5e---34387372672.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/p6em9un991eumh1un499fe3rj0/zuwunomepubixoru.pdfIn PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/6472194e89e53cbea4cc20830397a620/mubipu.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080814a00306---kezapenabeku.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/04d7337d4fb290db7d9b22f27953fea9/nekeximotakowetegegesu.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/dba55a1328a0c094e93184e78a2dd5ea/burorupuzipirubow.pdfIn PDF document text
    • https://sfilatinogourmet.it/file/75341651505.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/86949305937.pdfIn PDF document text
    • https://kede.org/userfiles/file/kumifozogof.pdfIn PDF document text
    • http://zonwering-nederland.com/ckfinder/userfiles/files/60064199031.pdfIn PDF document text
    • http://jedwines.com/cmsCart//upload/file/xefuvoxifoxog.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160869018208c8---32495419196.pdfIn PDF document text
    • http://livingkaneohe.com/userimages/66569092892.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/loxoxoli.pdfIn PDF document text
    • http://htwy.com/upload/file/wakugozepemilabu.pdfIn PDF document text
    • https://soyana.de/js/ckfinder/userfiles/files/4459033105.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607de65c974e9---gojafu.pdfIn PDF document text
    • https://zzwgjx.com/d/files/dagonujekifurexugoginokuv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=2018+nissan+pathfinder+car+manualPDF 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_off0000da39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA39 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f24b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24B 17360 bytes
SHA-256: 25dbb23575064cab789a7e7c2c049bf7bb14efb8f4c4e31fb2f1296914c6d61e
font_02_sfnt_off00011f84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F84 11268 bytes
SHA-256: 8636080eb0fa095ff1044805d6ffc6d7d3677124f650ec32a88931ecb4b83811

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