Malicious PDF — malware analysis report

Static analysis result for SHA-256 f272cf4a8133ae03…

MALICIOUS

PDF

74.2 KB Created: 2021-09-21 08:19:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 353f6c4049bd8abc521842e5369c3f51 SHA-1: addefd645598087a9253c007e715cf81ce39ba1e SHA-256: f272cf4a8133ae03f2652b93349a45d85a41450b99cd09e34b0f149e6c674ab5
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with a high heuristic indicating it functions as a link farm on disposable hosting. The ML classifier strongly suggests malicious intent. While no scripts were explicitly extracted, the structure and URL patterns are consistent with malicious PDFs designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • 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://ph789.com/pinhsuan/files/file/37156420137.pdf In PDF document text
    • http://portalinmobiliario24.com/uploades/fckeditorfile/3757447270.pdfIn PDF document text
    • http://zzzwchem.com/upload/files/27600732758.pdfIn PDF document text
    • https://euinsuti.uniluxgym.ro/app/webroot/files/userfiles/files/maxuladure.pdfIn PDF document text
    • https://stka.gr/ckfinder/userfiles/files/56653414760.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/6c3850b0ea46739872efdd2caedf9907/jetora.pdfIn PDF document text
    • https://vargyasnekonyveles.hu/kepek/other/file/rutanidufaderumuxavemax.pdfIn PDF document text
    • https://tanhaithanhvalves.com/quangcao/admin/file/lesisimoxikekoxe.pdfIn PDF document text
    • http://taeguektour.com/FileData/ckfinder/files/20210921_8DCACE71AA69B627.pdfIn PDF document text
    • http://hanilkwanla.com/uploads/files/rubunasawaponevibojan.pdfIn PDF document text
    • https://chulintemple.house-well.com/CKEdit/upload/files/75323910847.pdfIn PDF document text
    • http://seatraderhk.com/userfiles/60619063992.pdfIn PDF document text
    • http://wimborst-ceramics.nl/public/view/upload/fckeditor_images/file/tuwipoluwirosesapinexajan.pdfIn PDF document text
    • https://yauspeshen.com/ckfinder/userfiles/files/60190323593.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/161425c6e96a72---4099487213.pdfIn PDF document text
    • https://www.aukuras.org/ckfinder/userfiles/files/jadelewelefikeguje.pdfIn PDF document text
    • https://ceccargiurgiu.ro/userfiles/file/migukoguzaperajutisilenog.pdfIn PDF document text
    • http://form4concrete.ru/pics/cont/file/labulavevuxoliwizi.pdfIn PDF document text
    • http://hoteldanang.com/uploads/images/files/didikatesapirelaxugisupog.pdfIn PDF document text
    • https://jamurgoreng.net/contents/files/sipevuv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=phone+as+gamepad+for+android+tvPDF 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_off0000c00d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC00D 16344 bytes
SHA-256: d9f6dd49d3ef0fa2d655c1879bd3a12d9f0731bfde587c4a694212bbe2e0f174
font_01_sfnt_off0000ea0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0B 10968 bytes
SHA-256: 6089e4f880fb4d174961a3b9372f310349c9dae773ee4839de237a7c16dfed70
font_02_sfnt_off00010321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10321 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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