Malicious PDF — malware analysis report

Static analysis result for SHA-256 c12b9ad57077cf2c…

MALICIOUS

PDF

77.0 KB Created: 2021-09-05 13:51:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 321b32321d93ea17ac27a406a4450d7a SHA-1: 9d188cb4a9703182fa4db8f2c7ad3a8ebecb992b SHA-256: c12b9ad57077cf2c7004f8d6bbcbb8601958884b31573a09f5120bcf17535949
156 Risk Score

Malware Insights

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

This PDF was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to obscure the ultimate destination. The presence of these links and the overall structure strongly indicate a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e6d130c0e76---3178408643.pdf In PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/5jmrk0b3gvmmoh9nhmpn8j5235/62227014250.pdfIn PDF document text
    • http://simpelms.nl/userfiles//files/lirapodanowitibasitu.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/62g58ttbd4npclsa1j177lr56a/pikiletev.pdfIn PDF document text
    • http://nissanotogovap.net/uploads/images/files/lozorejobegubopo.pdfIn PDF document text
    • http://proxima-design.cz/files/file/lidileradugojulilen.pdfIn PDF document text
    • https://mokshadhamnepal.org/userfiles/files/fewiligotepi.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16098c069705a5---93277389162.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160bba74c68180---kibakivimaxadi.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bc1ef2022db---femumevemajuzuka.pdfIn PDF document text
    • http://rayanchem.com/d/files/13907811321.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607d38318c0a2---96810332596.pdfIn PDF document text
    • http://bibikid.ru/upload/ripovufukifagopoju.pdfIn PDF document text
    • http://htwy.com/upload/file/43683570531.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/6712b5f60f0bcb3b1d65cffe0088506b/vinanupesijasufugo.pdfIn PDF document text
    • http://seanmore.com/userData/board/file/17298168103.pdfIn PDF document text
    • http://alessandrobelleseveterinario.eu/userfiles/files/51447272497.pdfIn PDF document text
    • https://ddshower.com/ckfinder/userfiles/files/59801556637.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610e8c90b74e8---sugipidebusubu.pdfIn PDF document text
    • http://szjwwj.com/userfiles/file///peviwatojowulatotadolura.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/f971507020e99af6e76d5ad4b981c5e1/86419735848.pdfIn PDF document text
    • http://mudrberanova.cz/userfiles/file/94434232521.pdfIn PDF document text
    • https://optimuselearningschool.com/learning/site/images/uploadfiles/gemuforojafu.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba383bc1f4---42852700897.pdfIn PDF document text
    • http://hk-dcc.com/wp-content/plugins/super-forms/uploads/php/files/nb6c867gd0pf9q3qbvlua3ikm1/kufuvonotur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=volume+and+surface+area+of+sphere+worksheet+pdfPDF 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_off0000c877.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC877 11040 bytes
SHA-256: 56521034664d8c27688675efdf66f2144f423a3870e28f7a0f00eb4b7156d288
font_01_sfnt_off0000e211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE211 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fa23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA23 16896 bytes
SHA-256: 4c8fd24bc2faa2cf9a3b401b8d73d23646eba5e0263695d8e0e579d434d55464

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