Malicious PDF — malware analysis report

Static analysis result for SHA-256 15697f5ddd0c9126…

MALICIOUS

PDF

73.8 KB Created: 2021-09-09 03:10:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 69088ca3f2a938639288f2c37cdfe1c6 SHA-1: b3335a16a430937588cb9c5cbc47c7ff67697453 SHA-256: 15697f5ddd0c912690d09f82bcfda1d0c73b5396983e06a2ab96690c1e4e6bca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to various domains, many of which appear to be compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this. While no scripts were explicitly extracted, the PDF structure and link farm behavior are consistent with phishing or malware distribution campaigns.

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 https://pistant.ru/uplcv?utm_term=fundamental+of+nursing+sr+nancy+pdf PDF link annotation
    • https://habibitoursegypt.com/ckfinder/userfiles/files/14824770814.pdfIn PDF document text
    • http://tunesistudio.eu/userfiles/files/37268801705.pdfIn PDF document text
    • http://poexali.org/static/image/_u/system/files/58643390548.pdfIn PDF document text
    • https://kenkochaya.com/user_data/ckfinder/files/podefazorogupoli.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/087005140753a334c3d0546af393bd97/64463309016.pdfIn PDF document text
    • https://y3stwk65l-mn9.com/contents/files/16111774055.pdfIn PDF document text
    • https://worldmedglobal.com/userfiles/files/ladatixulojuwegek.pdfIn PDF document text
    • http://uelzecht.lu/userfiles/files/ruwejukoju.pdfIn PDF document text
    • http://studioriboldi.eu/userfiles/files/wenifanapi.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/80505b7da8b304fc79fe1d618f6e08d7/buvupafitapivikinujexozi.pdfIn PDF document text
    • https://youxsoft.com/uploads/files/30964708833.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161304750b6145---dosatanonefubo.pdfIn PDF document text
    • http://bharatandcompany.in/ckfinder/userfiles/files/tunolasowanogugobupowezu.pdfIn PDF document text
    • https://optimuselearningschool.aels.edu/learning/site/images/uploadfiles/11494994443.pdfIn PDF document text
    • http://www.yeosung21.or.kr/ckfinder/userfiles/files/1630518397.pdfIn PDF document text
    • https://tenfci.org/userfiles/file/74398278597.pdfIn PDF document text
    • http://burchiellati.com/file_fck/file/90399439360.pdfIn PDF document text
    • https://ntct.dz/ckfinder/userfiles/files/zeruvafufexonir.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/2bf74f4b03bfda74b1b2d1643938aef5/13317094331.pdfIn PDF document text
    • https://bunian-co.com/other_files/File/44427769565.pdfIn PDF document text
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/dajivinisevudajuk.pdfIn PDF document text
    • http://gojjang.com/uploads/files/87478403723.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/mujavevitibikedorediju.pdfIn PDF document text
    • http://tksvolga.ru/userfiles/file/18990494751.pdfIn PDF document text
    • https://ncvpte.in/userfiles/file/jotinoxoxidotugoti.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_off0000bfd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFD9 11156 bytes
SHA-256: 78ee66e518ce0bc9ddb04fa5be973ca6f5c59a56cb09978ddbf2fff93a998981
font_01_sfnt_off0000d9b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f1c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C7 15648 bytes
SHA-256: 3b9216d846cfabac409f7545ed881685e35a567bb7b23f26280b0ef3fa4d2b4e

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