Malicious PDF — malware analysis report

Static analysis result for SHA-256 176e33e61a762edb…

MALICIOUS

PDF

95.0 KB Created: 2021-07-19 17:36:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: dfba3bf29ed8c6eab441ab42f6f2d4e2 SHA-1: 5d0ca5c4f37f948ecee42dfcf24a87bf71435542 SHA-256: 176e33e61a762edba45de032b5afb1d50a154714c26e7bd37ce1fea1a1f36006
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites or disposable hosting, suggesting an attempt to obscure the final destination. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://bangprice.com/bangprice.com/beta/cms_image/file/ketasakazedi.pdf In PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/34628431643.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/fb23f43e64906361dd139ab5e0647ac3/47121367118.pdfIn PDF document text
    • http://salon-urody-bellis.pl/images/file/texudubodo.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e14530d2d75---jikumotojoveninolo.pdfIn PDF document text
    • http://euro-ex.com/bemufaxipudawes.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3ea5d76fe7---gazoxizarix.pdfIn PDF document text
    • http://feuerwehrobrigheim.de/upload/files/biwosok.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ebce980653---ferudofa.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aeaa8d5b0ff---13593303936.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/fiposesuvadukebuzadax.pdfIn PDF document text
    • http://paintmaster.hu/js/ckfinder/userfiles/files/semegofe.pdfIn PDF document text
    • https://batdongsandothanh.vn/luutru/files/datuvotaxekiduwelugutudes.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/3f3cad9203ccf5a0efdb3e9fc5d58bb0/7444659675.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a39c1cc1c9f---42882015688.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/ed8adcb13fabc4bbe365b5878c34ba21/27082054142.pdfIn PDF document text
    • https://ystechpro.com/nbloom/fckuploads/file/zejudujokodulipiwaraw.pdfIn PDF document text
    • http://centrons.com/uploaded/file/118519092260bc02c1aca67.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607354044856b---35830383904.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b05c8fa50a2---69336656608.pdfIn PDF document text
    • https://diarch.in/WYSIWYGImage/file/29335901186.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=parts+of+sentence+subject+and+predicatePDF 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_off000111e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E7 16820 bytes
SHA-256: 8df3b3b3865822ecb73e00a4ae6670d2d5267144b5c89b2e894ce1d9b80bbe4d
font_01_sfnt_off00013d59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D59 10940 bytes
SHA-256: 4e75ecc0554b1a79f237d8faeecff6b8964264b256ea92dd6c320708b8affc95
font_02_sfnt_off00015698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15698 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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