Malicious PDF — malware analysis report

Static analysis result for SHA-256 30d2d31301659bfd…

MALICIOUS

PDF

84.4 KB Created: 2021-09-06 17:43:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1afbc2deb8a5b4a749d7e3df19436585 SHA-1: a3b345690ac172474a454fde8fe30ab883b8eba4 SHA-256: 30d2d31301659bfdbf44b702a25a86d569adf526d7f0ba6e8363c1715d824c2e
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous URLs, many pointing to compromised CMS uploads or disposable hosting, forming a link farm designed to redirect users to malicious sites. The primary function appears to be directing users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://philabc.ru/uplcv?utm_term=star+wars+saga+edition+rpg+pdf+download PDF link annotation
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/c8cbc5dc8a160e2597bdfa87610992a4/4486317442.pdfIn PDF document text
    • http://accronline.com/userfiles/file/pabatigomupumolumesox.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071772923cdd---3939446517.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/c44e8839ceb9caad451f69ad3f0a2854/kesokopuxojivu.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/54927493575.pdfIn PDF document text
    • http://aven.su/userfiles/file/ginisarojorek.pdfIn PDF document text
    • http://unityproductions.com/upload/files/tavavikifovunavoliwiguzer.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee949b9efc---pewubebede.pdfIn PDF document text
    • http://penzionklara.cz/userfiles/file/30238466898.pdfIn PDF document text
    • https://vinamex.info/uploads/news_file/kibuzimapojalegudug.pdfIn PDF document text
    • http://nct-vn.com/userfiles/file/ladujomaror.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b30c623f6---40146995535.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16106d51eaa6f4---punuzigususuz.pdfIn PDF document text
    • https://mabuksusu.com/contents//files/turikamekotex.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/643d3fd54c9a92644b22ebe26e07367e/4549302135.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/bvk68g5i0b0gpuv32mmg56j4r6/juwekexime.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/43a386812ff89af821054584ccae5f9f/morolari.pdfIn PDF document text
    • https://santchavarabed.in/ckfinder/userfiles/files/85181817739.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a55ad2736c9---84827421677.pdfIn PDF document text
    • http://chocoenglish.com/_UploadFile/Images/file/boxumojibatoxixubaralo.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/m4ts3ij31rlio0k6u8703vvuvc/ligiwopopitotuwobesi.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/dsoc7usqmcrcj6svjhpg4dedr3/wozugovuko.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bfad992c3e9---sabovidela.pdfIn PDF document text
    • http://lubrifianti-auto.ro/files/file/19742147515.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_off0000e32f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32F 18492 bytes
SHA-256: 454ca8144fee35286d78583309855f0087bca63a58a33b123dc6fe5835bb0c53
font_01_sfnt_off000112d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012aec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AEC 10832 bytes
SHA-256: 5a8d3c0899ffac9e9d775e6d616838fa8123587cb9ec9b0d94d2891195486e8b