Malicious PDF — malware analysis report

Static analysis result for SHA-256 b92c0774731e15ac…

MALICIOUS

PDF

86.2 KB Created: 2021-06-26 10:58:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 09542f108073c5b3fba1c4b844d7fed3 SHA-1: 4b42520a4704e7897ffcc570e7eb0d98ca7db512 SHA-256: b92c0774731e15ac2c86c2495f488e92dc7db4eeea5bc797e2a931d5cf028275
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting. The heuristic firings indicate that this PDF is a link farm designed to direct users to potentially malicious content. ClamAV detection further supports its malicious classification as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://messtores.ca/fck_user_files/file/wosalotodovu.pdf
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a129ce925a4---lumenuv.pdf
    • http://asirakademi.com/resimler/files/41436410612.pdf
    • https://bloomeng.com/uploads/gevanarafek.pdf
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/2899edf17184d0833a06117553c4161e/31317732196.pdf
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af81b21f3f4---sevijomojomirogitegige.pdf
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/bd2e92e035c056ce9745b666a1553748/11641893571.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/15abbf5d64d717dd810c3b6ebc277387/tadagavuzula.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad3d2a4aa5c---wodepasunupekuliji.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/oqqacfigecmbdq8mlkdtel3g24/goxadexo.pdf
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/da34077d23272c436793a10682e2e6b8/9066881603.pdf
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/64f39a817362a7a42fe567a92ee513fa/90241802885.pdf
    • https://aquafilling.com/userfiles/file/3825700878.pdf
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/00fd3d5e2f2fdf96884e92828e29734f/gavewirurowevitujeligo.pdf
    • https://globalmediaminds.com/uploads/files/mofeguto.pdf
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160785fd8244f8---1096705475.pdf
    • https://telenovella-bg.com/files/parawuminowibepituzijira.pdf
    • http://glotecgh.com/upload/editor/file/vuxejoja.pdf
    • http://norilskgu.ru/userfiles/file/momilike.pdf
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/92617742587.pdf
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/8e3513726150a801f8b732086386ce7e/55279740306.pdf
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/v43cfp0juk985sh2csa58tcqmh/mewugofelabu.pdf
    • http://aep-tc.com/cache/fck_files/file/17346323124.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=after+ever+happy+pdf+free+online
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/2827e2ed06fa6ae5bcac89cdf14463c6/54709495625.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee88.bin
b50e823e34836b2601498ef18d4536e121018986e6aa97476e33f8c77b7ab172
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE88 10588 bytes
font_01_sfnt_off000106a3.bin
1584c3bc030d42f483d700dfd516fee623b2890280d11f9eb0363a5b1e1e33a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x106A3 16612 bytes
font_02_sfnt_off000131d3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x131D3 16792 bytes