Malicious PDF — malware analysis report

Static analysis result for SHA-256 72afe0e9dc524f45…

MALICIOUS

PDF

86.6 KB Created: 2021-07-13 23:56:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 57989390323fa4983f5e61bf2adb54d5 SHA-1: 0378a7296e60bbbf5fa9a6ddd51e37bfce4fdcfc SHA-256: 72afe0e9dc524f4569ee35a9d42aafb06a47046a1b7772f5f6eb168b262dcaa9
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. The primary attack pattern involves luring users through these links, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • 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.
  • 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://drafthe.ru/uplcv?utm_term=sims+4+best+way+to+increase+charisma PDF link annotation
    • http://laulumaja.fi/ckfinder/userfiles/files/35824849573.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16076e59a6316d---wodekoxisubesubimovowijup.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e258ea4e11e---xotowigumitunigefetujipib.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3da0f254cd---gogapitakegiso.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/cad664a52a9fb5d82c90f2dabf5d3f32/ruwotunowi.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/0h6045kjo67s8dql15hdvpdal5/20576000312.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/3c1ec23c3faa2f3f94f1e2c3563e1809/fogepovunudekasuse.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/6fd15bbb58caccdb72ffee4abaa9c0a9/kepoxelapomamugivivug.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/1270965cc3a6b70f00a013515347f439/89865608118.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/slegip19t3tpp7jr5rjk9um2mn/38928606453.pdfIn PDF document text
    • http://haohanlegend.com/Uploadfiles/files/mexozofoxowomore.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d508051a54---91533791286.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607adbec650ec---78042764377.pdfIn PDF document text
    • http://ahkkpcm.org/userfiles/98429344677.pdfIn PDF document text
    • http://stressmanagement-karriere.de/userfiles/file/25376058453.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/4a7b675f8e3b19747a70f72338e7ac0c/xanerajavofanomurariw.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/8176c9b78f375d546f6944bff1b4f651/95654426872.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/robusoxixumoxenoxuluvon.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/29ccaa8e8fe39ae5dab8dffd0fe46950/zisowetigakefujituguwe.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae605c08da---59378305268.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/hekp3b87v6l61sitg1omc3btgh/50026399968.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160e334f940256---tutazamiberoruwoxisuzifa.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/bufafoderevulud.pdfIn PDF document text
    • 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_off0000ef56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF56 17000 bytes
SHA-256: 5a9bfd31eab326bf4571c8f91907de5375722cac020f93c6dda209404f9ca39d
font_01_sfnt_off00011bcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BCD 10944 bytes
SHA-256: c7f057022f901b8d6d75845f9e1f3260bb585e937e8ffffd929774e438c21431
font_02_sfnt_off0001351a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1351A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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