Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ced1251e18b7c3b…

MALICIOUS

PDF

84.1 KB Created: 2021-08-25 04:21:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: cd9e9d6b9070aff70277ff9a0f9a534d SHA-1: 8f49f903fba233f1f2e266428688f7c6b604d20f SHA-256: 1ced1251e18b7c3ba141806a8b472edef1fd2e3970b247a6d209b97b3a2a2e0e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains numerous URLs pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm to distribute malicious content or phish for credentials. The document body is heavily obfuscated and unreadable, but the presence of multiple external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a clear intent to redirect users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://medvor.ru/uplcv?utm_term=young+thug+meek+mill PDF link annotation
    • http://kursadowicz.pl/Upload/file/luxigejewuzigedin.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/18be3cc818496308265529f012e24a4a/ruwonerojofubifoz.pdfIn PDF document text
    • http://africa-emergence2019.com/userfiles/file/57608078597.pdfIn PDF document text
    • https://www.alugutader.fr/ckfinder/userfiles/files/8245410033.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160708258a74e4---xazozujaxotagaka.pdfIn PDF document text
    • https://kltccompany.com/ckfinder/userfiles/files/28008171015.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab1d399a72---20147850322.pdfIn PDF document text
    • http://gerocuki.hu/user/file/86859486198.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16124ec77497c9---61129732176.pdfIn PDF document text
    • https://markeishahall.com/wp-content/plugins/super-forms/uploads/php/files/b0a2eb95d321a930cdfdfb68af1d8e7b/zilixojuwoxuzim.pdfIn PDF document text
    • http://gumberryoleschool.com/clients/33891/File/42844520542.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/wiwam.pdfIn PDF document text
    • http://netflor.pl/upload/File/8096704498.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/970e4af451efffc1f2d6575504834f0d/80480758583.pdfIn PDF document text
    • http://kleiberit.ru/files/file/89555361789.pdfIn PDF document text
    • http://bloemenwinkelindex.nl/images/uploads/dobefefozesewivugetugi.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c8fff4506fa---94827623181.pdfIn PDF document text
    • https://quangcaowebsite.vn/uploads/files/xonebunemujaju.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a1654d315e0---setotukujaw.pdfIn PDF document text
    • http://divorce-difficile.fr/userfiles/file/vovibegis.pdfIn PDF document text
    • https://j26clean.com/upload/files/sinerawanebosesadedipero.pdfIn PDF document text
    • https://pianotuningdarwin.com/userfiles/files/17701377704.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1611bc728e031f---29218172556.pdfIn PDF document text
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/af401f3a3fcebc53885ca8bda5c1b7f2/62159846663.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_off0000e71f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71F 10300 bytes
SHA-256: aabc28cab73a1cbf868e65439eb0548fb3eca40bea4010a00a5a2a823c3b29a9
font_01_sfnt_off0000fe0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0E 16784 bytes
SHA-256: 71f314daec43d94a0feb64236ab23066bede628e0c049a8f7bfb2674abb27e00
font_02_sfnt_off00012995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12995 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.